Name: Chocolate Peanut Butter Banana Crumble Cake Recipe
Prep time: 30 min
Cook time: 45 min
Total time: 1 h 15 min
Cuisine: American
Ingredients: 200g butter; 200g sugar; 300g flour; 1g salt; 1 tsp vanilla paste; 80g water; 110g butter; 115g dark chocolate (e.g. Maracaibo 65% or Cailler Dark 64%); 130g flour; 9g baking powder; 40g cocoa powder (Cailler); 5g salt; 220g sugar; 100g eggs (about 2 pieces); 50g sunflower oil; 50ml milk; 100g ripe bananas, smashed; 40g peanut butter (homemade or bought); 2 ripe bananas, sliced (for topping); 200g salted peanuts; 90g sugar; 108g glucose syrup; 75g water; 2g Maldon sea salt

Introduction

This chocolate peanut butter banana streusel cake is super moist and bursting with rich flavors. The combination of chocolate, peanut butter, and ripe bananas creates a perfectly balanced dessert topped with a crunchy crumble. Whether you make it as a large cake or mini loaves, it’s sure to delight every sweet tooth.

A close-up of a thick slice of dark brown chocolate cake with a thick crumbly light tan streusel layer on top, drizzled with a smooth light caramel sauce. The slice sits on white parchment paper on a wooden cutting board, with a few crumbs scattered around. In the background, there is a clear glass milk bottle and a wooden-handled knife on a white marbled surface. The overall scene is bright and clean, highlighting the textures of the cake and topping. Photo taken with an iphone --ar 4:5 --v 7

Ingredients

Streusel/Crumble:

200g butter

200g sugar
300g flour

1g salt
1 tsp vanilla paste

Chocolate peanut butter banana cake:

80g water
110g butter

115g dark chocolate (e.g. Maracaibo 65% or Cailler Dark chocolate 64%)
130g flour
9g baking powder

40g cocoa powder (Cailler)
5g salt
220g sugar

100g eggs (about 2 pieces)
50g sunflower oil
50ml milk

100g ripe bananas (smashed)
40g peanut butter (homemade or bought)
2 ripe bananas, sliced for topping

Homemade peanut butter:

200g salted peanuts
90g sugar

108g glucose syrup
75g water
2g Maldon sea salt

Instructions

Step 1: Prepare the streusel by mixing butter, sugar, flour, salt, and vanilla paste in a bowl using a paddle attachment until it reaches a crumbly texture. Avoid overmixing to prevent forming dough. Set aside.

Step 2: Melt water, butter, and dark chocolate over a Bain Marie until smooth. Mix flour, baking powder, cocoa powder, and salt separately.

Step 3: Whisk milk and sunflower oil together lightly. In a mixer, add sugar to the melted chocolate mixture and blend well. Add eggs one at a time, mixing thoroughly after each.

Step 4: Add the dry ingredients and milk-oil mixture gradually, scraping the bowl sides to avoid lumps. Fold in smashed bananas and peanut butter until batter is smooth.

Step 5: Pour batter into prepared molds. Arrange banana slices on top, pressing them gently into the batter. Sprinkle the streusel crumble generously over the top.

Step 6: Bake at 175°C (350°F) for 40–45 minutes or until a skewer inserted comes out clean. Let cool completely before drizzling with peanut butter.

Step 7: To make homemade peanut butter, bring sugar, glucose syrup, and water to a boil, simmer 30 seconds, then pour over peanuts. Let soak for 2 hours. Drain and spread peanuts on baking paper. Roast at 160°C (320°F) for 15–20 minutes until golden and caramelized. Cool, then process with Maldon sea salt until smooth. Store in an airtight container in the fridge.

Step 8: Warm the peanut butter slightly if needed and drizzle over the cooled cake before serving.

Tips & Variations

Use a high-quality dark chocolate for deeper flavor and better texture.

Try mini loaf cakes for easy portioning and freezing convenience.

Leftover streusel can be frozen for later use.

May substitute store-bought peanut butter if short on time.

Press banana slices lightly into the batter to prevent them from burning while baking.

FAQs

Can I use regular peanut butter instead of homemade?

Yes, store-bought peanut butter can be used and will still add delicious flavor, though homemade provides a fresher and slightly sweeter taste.

How do I know when the cake is fully baked?

Insert a skewer into the center of the cake. If it comes out clean or with just a few crumbs, the cake is done. If wet batter sticks to the skewer, bake a few minutes longer and test again.