Flourless Chocolate Oat & Banana Cake

A naturally sweet, rich chocolate cake made with oats and bananas instead of flour or refined sugar.

Prep Time: 10 minutes
Bake Time: 35–40 minutes
Servings: 6–8 slices

This cake has a soft, fudgy texture and a deep chocolate flavor, making it a satisfying dessert or snack made from simple, wholesome ingredients.

🧺 Ingredients

Base

1½ cups (150 g) oat flakes (rolled or quick oats)
⅔ cup (150 g) milk (dairy or plant-based)
2 large ripe bananas, mashed until smooth
2 eggs

Flavor & Rise

¼ cup (30 g) cocoa powder
1 teaspoon (5 g) baking powder
1 g sweetener (optional: stevia or monk fruit)

Crunch & Topping

1 oz (30 g) walnuts, chopped
1 oz (30 g) dark chocolate, melted or finely chopped

👩‍🍳 Instructions

1️⃣ Soften the Oats

Place the oat flakes and milk into a medium bowl.
Stir gently and allow them to rest for 10 minutes so the oats absorb the liquid and become tender.

2️⃣ Prepare the Batter

In a large bowl, mash the bananas until smooth.

Add the eggs and whisk until evenly blended.

Sprinkle in the cocoa powder, baking powder, and sweetener (if using).
Stir gently until the mixture looks smooth and well combined.

Add the softened oats and milk to the banana mixture.
Stir until everything is evenly incorporated.

Fold in most of the chopped walnuts, saving a small amount for the top.

3️⃣ Bake the Cake

Lightly coat a small cake pan or silicone mold with oil, or line it with parchment paper.

Pour the batter into the pan and gently smooth the surface.

Place in a preheated oven at 350°F (180°C) and bake for 35–40 minutes, until:

The top looks set
The center feels firm
A toothpick inserted comes out clean

4️⃣ Finish the Cake

Allow the cake to cool slightly in the pan.

Melt the dark chocolate and drizzle it gently over the top.

Sprinkle the remaining walnuts over the chocolate while it is still soft.

Let the topping set before slicing.

🍽️ Serving Ideas

Enjoy warm or chilled
Serve with yogurt or fruit
Pair with tea or coffee
Lightly dust with cocoa powder if desired

💡 Helpful Tip

For a smoother, more cake-like texture, you may blend the oats, milk, eggs, and bananas together in a blender before mixing in the cocoa powder and walnuts by hand.