This Chocolate Banana Baked Oatmeal is soft, deeply chocolatey, naturally sweetened with ripe bananas, and incredibly easy to prepare. It works beautifully as a make-ahead breakfast, afternoon snack, or simple dessert.

The recipe needs only a handful of basic ingredients: rolled oats, ripe bananas, cocoa powder, milk, and baking powder. Chocolate chips and nuts are completely optional, but they make the baked oatmeal feel a little more indulgent.

One important detail: the original method mentions oat flour even though the ingredient list calls for rolled oats. Both versions work, but they produce different textures. Whole rolled oats create a traditional baked-oatmeal texture, while finely blended oats give you something softer and more cake-like.

I’ll explain both methods below so you can choose the result you prefer.

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Recipe Overview

Prep time: 10 minutes
Optional oat-soaking time: 5 minutes
Bake time: 20–25 minutes
Cooling time: 10 minutes
Total time: about 40–45 minutes
Servings: 4
Baking dish: approximately 18 × 18 cm or a 20 cm round dish
Oven temperature: 180°C conventional / 165–170°C fan
Difficulty: Very easy
Texture: Moist, soft, chocolatey, and slightly fudgy

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Ingredients

For the Baked Oatmeal

• 90 g rolled oats
• 240 g very ripe banana, about 2 medium bananas without peel
• 25 g unsweetened cocoa powder or cacao powder
• 4 g baking powder, about 1 teaspoon
• 180 ml milk of choice
• 1 small pinch of salt, optional but recommended
• 30–40 g chocolate chips, optional

Optional Topping

• 15–20 g additional chocolate chips
• 20 g chopped walnuts, pecans, almonds, or hazelnuts

For the Baking Dish

• a little butter or neutral oil

or

• baking parchment

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Rolled Oats or Oat Flour?

You can prepare this recipe in two different ways.

Version 1: Rolled Oats

Use the 90 g rolled oats exactly as they are.

The finished baked oatmeal will have:

• more texture;
• visible oat flakes;
• a softer breakfast-style consistency;
• slightly more chew.

This is my preferred option if you want traditional baked oatmeal.

Version 2: Homemade Oat Flour

Blend the 90 g oats in a food processor or blender until finely ground.

The finished bake becomes:

• smoother;
• softer;
• more cake-like;
• easier to cut into neat squares.

Chef’s tip:
You can also blend only half the oats. Using 45 g oat flour and 45 g whole rolled oats gives an excellent balance between a soft crumb and some oat texture.

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Choosing the Right Bananas

For this recipe, the bananas should be very ripe.

Look for bananas with:

• plenty of brown spots;
• soft flesh;
• a strong banana aroma.

The riper they are, the sweeter your baked oatmeal will taste without needing added sugar.

Avoid firm green-yellow bananas. They contain less developed sweetness and are much harder to mash smoothly.

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Cocoa Powder or Cacao Powder?

Both work.

Unsweetened Cocoa Powder

Gives a familiar, smooth chocolate flavor.

Cacao Powder

Usually has a slightly stronger, more bitter chocolate note.

If using particularly bitter cacao powder, you may prefer adding a few chocolate chips or a small amount of maple syrup.

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What Milk Can I Use?

Almost any milk works:

• whole milk;
• low-fat milk;
• oat milk;
• almond milk;
• soy milk;
• coconut drink.

For plant-based versions, use an unsweetened milk if you want the banana to provide most of the sweetness.

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Equipment

You will need:

• large mixing bowl
• fork or potato masher
• kitchen scale
• whisk or spatula
• 18 × 18 cm baking dish or 20 cm round dish
• baking parchment, optional
• blender or food processor, optional

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Detailed Step-by-Step Instructions

1. Preheat the Oven

Preheat your oven to:

180°C conventional heat

or

165–170°C fan

Place the rack in the middle of the oven.

Why Preheating Matters

Baking powder begins working once it becomes wet.

Putting the mixture into a properly heated oven helps it rise immediately and gives you a lighter texture.

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2. Prepare the Baking Dish

Lightly grease an approximately 18 × 18 cm baking dish with butter or neutral oil.

Alternatively, line it with baking parchment.

Chef’s Tip

If you want to remove the entire baked oatmeal and cut it into neat meal-prep squares, parchment is the easiest option.

Leave a little paper hanging over two sides so you can use it as handles.

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3. Decide on Your Oat Texture

For rustic baked oatmeal, leave the 90 g oats whole.

For a smoother texture, place them in a blender or food processor and process until they resemble coarse flour.

Do not worry if the flour is not completely powdery.

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4. Mash the Bananas

Peel your ripe bananas and weigh approximately 240 g banana flesh.

Place them in a large bowl.

Mash thoroughly with a fork until mostly smooth.

How Smooth Should They Be?

A few tiny banana pieces are fine.

Avoid leaving large chunks because they can create very wet pockets in the finished baked oatmeal.

Chef’s secret:
The smoother the banana is mashed, the more evenly its natural sweetness spreads through the whole bake.

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5. Add the Milk

Pour 180 ml milk into the mashed banana.

Whisk until evenly combined.

The mixture should look creamy and fairly smooth.

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6. Add the Cocoa Powder

Add 25 g unsweetened cocoa powder.

Whisk carefully.

Cocoa is very light and tends to create a cloud of powder if stirred too aggressively at first.

Start slowly, then whisk more firmly once it has absorbed some liquid.

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7. Add a Pinch of Salt

Add a small pinch of fine salt.

This is optional, but I strongly recommend it.

Salt does not make the oatmeal taste salty. It helps intensify both chocolate and banana flavors.

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8. Add the Baking Powder

Add 4 g baking powder.

Mix thoroughly so it is distributed evenly.

Why Even Distribution Matters

A concentrated pocket of baking powder can taste unpleasant and cause uneven rising.

If you are using oat flour, you can mix the baking powder into the oat flour first.

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9. Add the Oats

Stir in the 90 g rolled oats or oat flour.

Mix until no dry oat pockets remain.

What Should the Mixture Look Like?

With rolled oats, it will look fairly loose at first.

With oat flour, it will become thicker almost immediately.

Both are correct.

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10. Let Whole Rolled Oats Rest Briefly

If using whole rolled oats, let the mixture stand for about 5 minutes.

The oats will absorb some of the milk and banana moisture.

This creates a more cohesive baked oatmeal.

If you are using finely ground oat flour, this rest is not essential.

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11. Add Chocolate Chips

If using chocolate chips, fold in about 30–40 g.

Do not overmix.

You can use:

• dark chocolate chips;
• milk chocolate chips;
• semi-sweet chocolate chips;
• chopped dark chocolate.

For a Less Sweet Version

Simply leave the chocolate chips out.

The ripe banana still provides plenty of flavor and natural sweetness.

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12. Check the Consistency

The mixture should be thick but easily spreadable.

If It Looks Extremely Thick

Add 15–30 ml extra milk.

If It Looks Very Thin

Let it stand another 5 minutes.

Rolled oats continue absorbing liquid as they sit.

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13. Transfer to the Baking Dish

Pour or spoon the mixture into the prepared dish.

Spread it evenly with a spatula.

Make sure the corners are filled and the layer is approximately the same thickness throughout.

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14. Add the Toppings

Sprinkle the surface with optional:

• extra chocolate chips;
• chopped walnuts;
• chopped pecans;
• almonds;
• hazelnuts.

Press the toppings down only very lightly.

Why Not Push Them Deep into the Batter?

Keeping some toppings exposed gives you more toasted flavor and a more attractive surface.

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Baking

15. Bake for 20–25 Minutes

Place the dish on the middle oven rack.

Bake at 180°C for approximately 20–25 minutes.

Start checking around the 20-minute mark.

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16. Check the Center

The baked oatmeal is ready when:

• the edges look set;
• the center no longer looks liquid;
• the surface springs back slightly when touched;
• a toothpick inserted in the center comes out without raw batter.

Important

Melted chocolate on the toothpick does not mean the oatmeal is underbaked.

Test another area if you have hit a chocolate chip.

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17. Do Not Overbake

This is one of the most important tips.

Chocolate baked oatmeal should stay moist in the middle.

If you wait until the inside seems completely dry, it can become dense after cooling.

A few moist crumbs on the toothpick are perfectly fine.

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Cooling

18. Let It Rest for 10 Minutes

Remove the dish from the oven.

Allow it to rest for about 10 minutes before serving.

Why?

Immediately after baking, the center is very soft.

During the rest:

• the oats absorb remaining moisture;
• the structure becomes firmer;
• the slices hold together better.

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Serving

Serve the baked oatmeal warm, at room temperature, or chilled.

It is delicious on its own, but you can also add:

• Greek yogurt;
• natural yogurt;
• fresh banana slices;
• fresh berries;
• peanut butter;
• almond butter;
• a small drizzle of maple syrup.

For breakfast, I especially like it with plain Greek yogurt and berries.

For dessert, warm a piece slightly and add a few extra chocolate chips.

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Chef’s Best Tips

1. Use Very Ripe Bananas

They are the main source of sweetness.

The browner the banana skin, the sweeter and more aromatic the fruit usually is.

2. Weigh the Banana

Bananas vary enormously in size.

Using approximately 240 g makes the texture much more predictable.

3. Choose Your Oat Texture

Whole oats = traditional baked oatmeal.

Ground oats = softer and more cake-like.

4. Try Half Whole, Half Ground

This gives an excellent balance of texture and tenderness.

5. Use Unsweetened Cocoa

Sweetened drinking chocolate contains extra sugar and behaves differently.

6. Add Salt

A tiny pinch makes chocolate taste richer.

7. Let Whole Oats Hydrate

Five minutes of resting improves the finished texture.

8. Do Not Add Too Much Milk

Bananas already provide substantial moisture.

9. Do Not Overbake

A slightly moist center is much better than dry baked oats.

10. Toast the Nuts Naturally

Leaving nuts exposed on top allows them to toast as the oatmeal bakes.

11. Cool Before Meal-Prep Slicing

For very clean squares, let the oatmeal cool completely before cutting.

12. Refrigerate Before Cutting for Extra-Neat Pieces

Thirty minutes in the refrigerator makes the bake particularly easy to portion.

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Common Problems and Solutions

My Baked Oatmeal Is Too Dry

Possible causes:

• too much oat flour;
• not enough banana;
• baking too long;
• too little milk.

Next time, weigh the banana and begin checking after 20 minutes.

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The Middle Is Very Wet

Possible causes:

• unusually large bananas;
• too much milk;
• very small or deep baking dish;
• insufficient baking time.

Bake for another 3–5 minutes and test again.

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It Tastes Bitter

Unsweetened cocoa can taste intense when the bananas are not ripe enough.

Use very ripe bananas or add a small amount of chocolate chips.

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The Baked Oatmeal Is Very Dense

If you used oat flour, a denser cake-like result is normal.

For more texture, use whole rolled oats or a 50/50 mixture.

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It Crumbles When Cut

It may still be too hot.

Let it cool for at least 10–15 minutes.

For meal-prep squares, cool completely.

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The Chocolate Chips Sink

This is not a problem, but if you want them more evenly distributed, use mini chocolate chips or sprinkle most of them on top.

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Flavor Variations

Chocolate Peanut Butter

Swirl 20–30 g peanut butter over the surface before baking.

Chocolate Raspberry

Add 60–80 g fresh or frozen raspberries.

If using frozen berries, do not thaw them first.

Chocolate Walnut

Add 30 g chopped walnuts to the batter.

Double Chocolate

Use 40 g chocolate chips in the batter and another 15 g on top.

Chocolate Cinnamon

Add 1–2 g ground cinnamon.

Chocolate Coconut

Add 15–20 g unsweetened shredded coconut.

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Meal Prep and Storage

This recipe is excellent for meal prep.

Allow the baked oatmeal to cool completely before storing.

Cut into individual portions and place in an airtight container.

Refrigerator

Store for up to 3–4 days.

Serving From the Refrigerator

Eat chilled or warm briefly before serving.

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How to Reheat

Microwave

Heat one portion for about 20–40 seconds.

Oven

Warm at 160°C for approximately 5–8 minutes.

Air Fryer

Heat at about 150–160°C for 3–5 minutes.

Avoid reheating too long because baked oatmeal can dry out.

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Can You Freeze Chocolate Banana Baked Oatmeal?

Yes.

1. Cool completely.
2. Cut into portions.
3. Separate pieces with parchment if stacking.
4. Store airtight.
5. Freeze for up to about 2 months.
6. Thaw overnight in the refrigerator or reheat gently from frozen.

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Nutrition

Approximate nutrition per serving when divided into 4 portions, using dairy milk and without optional chocolate chips or nuts:

• Calories: about 180–185 kcal
• Protein: about 7 g
• Fat: about 4 g
• Carbohydrates: about 34 g
• Fiber: about 6 g
• Sugars: about 10 g

Adding chocolate chips, nuts, nut butter, or sweetened plant milk will increase the calorie, fat, and sugar content.

These values are estimates and will vary depending on the exact milk, bananas, cocoa, and oats used.

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FAQ

Can I Use Quick Oats?

Yes.

The texture will be softer and slightly less chewy.

You may not need the full 5-minute soaking time.

Can I Use Steel-Cut Oats?

Not for this exact recipe.

Steel-cut oats need much more liquid and a longer cooking time.

Can I Make Oat Flour Myself?

Yes.

Blend rolled oats until finely ground.

Do I Need to Blend the Oats?

No.

Whole rolled oats work perfectly well.

Blending simply makes the texture smoother and more cake-like.

Is This Recipe Gluten-Free?

It can be.

Oats themselves do not contain gluten in the same way wheat does, but they are often cross-contaminated during processing.

For a gluten-free recipe, use certified gluten-free oats and verify that all other ingredients are also gluten-free.

Can I Use Plant-Based Milk?

Yes.

Almond, oat, soy, or other unsweetened plant milk works well.

Can I Use Water Instead of Milk?

Technically yes, but the result will be less rich and flavorful.

Can I Add an Egg?

Yes.

One egg can be added for a slightly firmer, more cake-like texture.

The original recipe does not require one.

Do I Need Added Sugar?

No.

Very ripe bananas provide the sweetness in the base recipe.

Can I Add Maple Syrup or Honey?

Yes.

If your bananas are not very sweet, add about 15–30 g maple syrup or honey.

You may want to reduce the milk slightly.

Can I Leave Out the Cocoa?

Yes.

You will get banana baked oatmeal rather than chocolate baked oatmeal.

Replace the cocoa with approximately 15–20 g additional oat flour or finely ground oats if necessary for consistency.

Cocoa Powder or Cacao Powder?

Either works.

Cacao often has a stronger, slightly more bitter flavor.

Can I Add Protein Powder?

Yes, but protein powder absorbs moisture.

Start with about 15–20 g and add a little extra milk if the mixture becomes very thick.

Can I Add Peanut Butter?

Absolutely.

Stir in or swirl about 20–30 g before baking.

Can I Add Frozen Berries?

Yes.

Add them directly from frozen rather than thawing first.

What Size Baking Dish Should I Use?

Approximately 18 × 18 cm or a 20 cm round dish works well.

Can I Double the Recipe?

Yes.

Use a larger baking dish and expect the baking time to increase slightly depending on the thickness.

How Do I Know When It Is Done?

The center should be set rather than liquid, and a toothpick should come out without raw batter.

A few moist crumbs are fine.

Can I Eat It Warm?

Yes.

Warm baked oatmeal is particularly soft and chocolatey.

Can I Eat It Cold?

Yes.

After refrigeration it becomes firmer and is excellent for meal prep.

Can I Make It the Night Before?

Yes.

Bake it completely, cool it, cover it, and refrigerate overnight.

Can I Prepare the Raw Batter the Night Before?

I prefer baking it immediately.

If raw rolled oats sit overnight, they absorb much more liquid and the final texture changes significantly.

Are Chocolate Chips Necessary?

No.

They are completely optional.

Which Nuts Work Best?

Walnuts, pecans, hazelnuts, and almonds are all good choices.

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blended oat flour creates a smoother, cake-like result. Avoid overbaking; the center should remain slightly moist rather than dry.