Healthy Oatmeal Apple Banana Cake – No Flour & No Added Sugar

This Healthy Oatmeal Apple Banana Cake is a rich, naturally sweet homemade dessert made without traditional flour or added granulated sugar. It combines ripe bananas, fresh apple, oats, cocoa, raisins, seeds, and walnuts in one easy and satisfying cake.

The 2 ripe bananas provide natural sweetness and moisture, while 1 apple adds fresh fruit flavor and a tender texture. Instead of regular flour, the recipe uses approximately 90 g of oats, making oats the main grain base of the cake.

 

Cocoa powder gives it a delicious chocolate character, while cinnamon, raisins, pumpkin seeds, and walnuts add layers of flavor and texture. Once baked, the cooled cake is finished with a simple topping made from sugar-free dark chocolate and hot milk, then sprinkled with walnuts.

Perfect as a homemade dessert, afternoon snack, or something sweet to enjoy with coffee or tea, this oatmeal banana cake proves that a simple fruit-and-oat dessert can still feel wonderfully indulgent.

 

Ingredients

For the Oatmeal Banana Cake

• 2 ripe bananas
• 2 tablespoons raisins
• 2 tablespoons cocoa powder
• 2 eggs
• 1 teaspoon baking powder
• 1 cup oats (approximately 90 g)
• 5 tablespoons yogurt or sour cream
• 1 apple
• 1 tablespoon pumpkin seeds
• 2 tablespoons walnuts
• 1 teaspoon cinnamon
• Olive oil, for greasing the pan

For the Chocolate Topping

• 80 g sugar-free dark chocolate
• 3 tablespoons hot milk
• Walnuts, as needed for topping

 

How to Make Healthy Oatmeal Apple Banana Cake

1. Prepare the Raisins

Place 2 tablespoons raisins in a small bowl and cover them with cold water.

Allow them to soak for approximately 15 minutes.

Once softened, drain the raisins thoroughly and set them aside.

2. Prepare the Bananas

Peel 2 ripe bananas and cut them into smaller pieces.

Place them in a mixing bowl and mash thoroughly with a fork until you have a smooth banana puree.

A blender can also be used if you prefer an especially smooth consistency.

Ripe bananas work particularly well because they are naturally sweeter and easier to mash.

3. Add the Cocoa Powder

Add 2 tablespoons cocoa powder to the mashed bananas.

Mix until the cocoa is evenly incorporated and the banana mixture becomes chocolatey.

 

4. Add the Eggs

Crack 2 eggs into the banana and cocoa mixture.

Add 1 teaspoon baking powder.

Stir or whisk until everything is thoroughly combined.

5. Add the Oats and Yogurt

Add 1 cup oats, approximately 90 g, followed by 5 tablespoons yogurt or sour cream.

Mix thoroughly until the oats are evenly coated with the wet ingredients.

The oats replace traditional flour as the main grain component of this cake.

6. Prepare the Apple

Peel 1 apple and remove the core.

Cut the apple into small pieces.

Try to keep the pieces reasonably similar in size so they soften evenly while baking.

Add the chopped apple to the oatmeal mixture.

 

7. Add the Raisins, Seeds, and Walnuts

Add the drained raisins along with:

• 1 tablespoon pumpkin seeds
• 2 tablespoons walnuts
• 1 teaspoon cinnamon

Stir gently until the fruit, nuts, seeds, and cinnamon are evenly distributed throughout the mixture.

8. Preheat the Oven

Preheat your oven to 180°C (356°F).

Lightly grease a suitable baking pan with olive oil.

The original recipe does not specify an exact pan size, so no pan dimensions have been added.

9. Transfer the Batter to the Pan

Pour or spoon the prepared oatmeal banana mixture into the greased baking pan.

Spread it evenly and smooth the surface with a spatula.

Because this recipe uses oats, fresh fruit, nuts, and seeds instead of conventional flour-based cake batter, the unbaked mixture may have a more textured appearance than a traditional cake.

 

10. Bake

Place the cake in the preheated oven.

Bake at 180°C (356°F) for approximately 35 minutes.

Check for doneness by inserting a toothpick or wooden skewer into the center.

It should come out without wet batter attached.

11. Cool Completely

Remove the cake from the oven and allow it to cool.

Let it cool completely before adding the chocolate topping.

This is important because applying chocolate to a hot cake can make the topping excessively thin.

Make the Sugar-Free Chocolate Topping

12. Prepare the Chocolate

Place 80 g sugar-free dark chocolate in a heatproof bowl.

If necessary, chop the chocolate into smaller pieces so it melts more easily.

 

13. Add the Hot Milk

Add 3 tablespoons hot milk to the chocolate.

Stir until the chocolate has melted and the mixture becomes smooth.

Continue stirring gently until you have a spreadable chocolate topping.

14. Decorate the Cake

Spread or drizzle the chocolate mixture over the completely cooled oatmeal cake.

Finish by sprinkling walnuts over the top according to your preference.

Allow the chocolate topping to settle before slicing.

 

Tips for the Best Oatmeal Banana Cake

Use ripe bananas: The riper the bananas, the more natural sweetness and moisture they contribute.

Soak the raisins: The original recipe calls for soaking the raisins for 15 minutes, which softens them before they go into the cake.

Cut the apple into small pieces: Smaller pieces distribute more evenly and soften more easily during baking.

Use yogurt or sour cream: Either can be used according to the original recipe.

Don’t skip the cinnamon: Cinnamon complements the banana, apple, cocoa, and walnuts particularly well.

Cool before decorating: Make sure the cake has cooled before adding the chocolate topping.

Check your chocolate label: If avoiding added sugar is important, verify that the dark chocolate you use is actually labeled sugar-free or has no added sugar according to your dietary needs.

 

Why You’ll Love This Recipe

This cake brings together several flavorful ingredients without relying on traditional flour or added granulated sugar.

The main mixture contains:

• 2 ripe bananas
• 1 apple
• 90 g oats
• 2 eggs
• 5 tablespoons yogurt or sour cream
• 2 tablespoons raisins
• 1 tablespoon pumpkin seeds
• 2 tablespoons walnuts

Bananas and apple contribute natural fruit sweetness and moisture.

Oats provide the cake’s main grain base, while cocoa and cinnamon give it a richer dessert-like flavor.

Raisins, pumpkin seeds, and walnuts provide contrasting chewy and crunchy textures.

Finally, 80 g sugar-free dark chocolate mixed with hot milk transforms the simple oatmeal cake into a more indulgent-looking dessert.

 

No Flour and No Added Sugar

This recipe contains no traditional wheat flour. Instead, it uses 1 cup (approximately 90 g) oats.

It also contains no added granulated sugar in the cake batter.

However, calling the finished dessert completely “sugar-free” can be misleading because bananas, apples, raisins, yogurt, and milk naturally contain sugars. Depending on the products you buy, some raisins or other packaged ingredients can also contain added sweeteners.

For that reason, “No Added Sugar” is a more accurate description when all packaged ingredients used are unsweetened.

 

Serving Suggestions

This oatmeal apple banana cake can be enjoyed as:

• A simple homemade dessert
• An afternoon snack
• A breakfast-style treat
• A coffee or tea accompaniment
• A chilled chocolate-topped dessert

It also pairs well with plain yogurt, fresh berries, sliced banana, or additional fresh apple.

Because the cake already contains fruit, chocolate, walnuts, and seeds, it can also be served completely on its own.

How to Store Oatmeal Apple Banana Cake

Allow the cake and chocolate topping to cool and set completely before storing.

Place the cake in an airtight container and keep it in the refrigerator for up to 4–5 days, as specified in the original recipe.

For the best quality, keep the cake covered so it doesn’t dry out or absorb other refrigerator odors.

Individual slices can be served chilled or allowed to sit briefly at room temperature before eating.

 

Optional Variations

The original recipe also suggests several ways to customize the cake.

You can add 1 teaspoon chia seeds for additional texture.

The raisins can be replaced with dried cranberries if preferred.

For a moister cake, the original variation suggests increasing the yogurt from 5 tablespoons to 6 tablespoons.

For additional oat texture, you can add an extra 1 tablespoon oats.

These are optional variations rather than changes to the main recipe.

 

Frequently Asked Questions

Is this cake flour-free?

The recipe contains no traditional flour. It uses 1 cup (approximately 90 g) oats instead.

Is this cake completely sugar-free?

There is no added granulated sugar in the main recipe, and the topping uses sugar-free dark chocolate.

However, bananas, apples, raisins, yogurt, and milk contain naturally occurring sugars. Always check packaged ingredient labels if you need to avoid added sugars.

 

How many bananas do I need?

Use 2 ripe bananas.

How much oatmeal do I need?

Use 1 cup oats, approximately 90 g.

Do I need to grind the oats into flour?

The supplied recipe simply calls for oats and does not instruct you to grind them, so grinding is not required in this version.

Can I use sour cream instead of yogurt?

Yes. The recipe calls for 5 tablespoons yogurt or sour cream.

 

Why should I soak the raisins?

Soaking the 2 tablespoons raisins in cold water for 15 minutes helps soften them before baking.

What temperature should I bake the cake at?

Bake in a preheated oven at 180°C (356°F).

How long should I bake it?

Bake for approximately 35 minutes, checking that the center is fully set before removing it from the oven.

How do I make the chocolate topping?

Combine 80 g sugar-free dark chocolate with 3 tablespoons hot milk and stir until smooth.

Spread it over the cooled cake and finish with walnuts.

How long can I store the cake?

The original recipe recommends keeping it in the refrigerator for up to 4–5 days.

 

Final Thoughts

This Healthy Oatmeal Apple Banana Cake is a simple fruit-filled dessert made without traditional flour or added granulated sugar.

With 2 ripe bananas, 1 apple, 90 g oats, cocoa, yogurt, raisins, pumpkin seeds, cinnamon, and walnuts, it offers a delicious combination of soft, chewy, and crunchy textures.

Bake it at 180°C (356°F) for approximately 35 minutes, let it cool completely, then finish it with 80 g sugar-free dark chocolate mixed with 3 tablespoons hot milk and a sprinkling of walnuts.

The result is a moist, chocolatey oatmeal cake that’s perfect when you want a homemade dessert built around fruit, oats, nuts, and simple ingredients.