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Bruce Bogtrotters Chocolate Cake from Roald Dahl's Matilda | Food in Literature

Bruce Bogtrotter’s Chocolate Cake | Matilda

  • Author: Bryt @


Units Scale

Chocolate Mayonnaise Cake

  • 1 cup white sugar
  • 1 cup brown sugar
  • 1 1/3 cups (good quality) mayonnaise
  • 50g | 2 ounces dark chocolate melts
  • 2/3 cup unsweetened cocoa powder
  • 1 3/4 cups boiling water
  • Mixture of 2 3/4 cups plain flour, 1 1/4 teaspoons baking soda, 1/4 teaspoon baking powder
  • 2 large eggs
  • 1 teaspoon vanilla essence


  • 280g | 10 ounces dark chocolate melts
  • 1 1/2 cups | 340g | 3 sticks softened butter
  • 3 cups powdered sugar
  • 3 tbsp cocoa powder
  • 1 tbsp instant coffee
  • 12 tbsp boiling water


Chocolate Mayonnaise Cake

  1. Preheat your oven to 350°F or 175°C.
  2. In a mixer, combine the mayonnaise, white sugar and brown sugar.
  3. In a glass bowl, stir together the boiling water and cocoa powder.
  4. In another glass bowl, melt on low in the microwave, the chocolate melts.
  5. Stir in with the cocoa mixture.
  6. To the mixer, alternate adding the flour mixture and the chocolate mixture.
  7. Then add in the eggs and vanilla essence.
  8. Butter/grease your cake pan.
  9. Pour half the batter into the cake pan and bake for 20-30 minutes, until a skewer comes out clean from the centre.
  10. Pop out of the cake pan, grease the pan again, and pour in the rest of the batter.
  11. Bake for 20-30 minutes, until a skewer comes out clean from the centre.
  12. Set aside to cool.
  13. Slice both cakes across in half.


  1. In a clean mixer bowl, beat the butter until smooth.
  2. Pour in the icing sugar and mix.
  3. Place the chocolate melts in a glass bowl and melt on low in the microwave.
  4. In another small bowl, pour in the cocoa powder, instant coffee and boiling water. Stir.
  5. Pour both the cocoa powder mix and the melted chocolate into the mixer.
  6. Mix until completely combined.
  7. Spread a cm of icing across the tops of each layer of cake and place in fridge to firm.
  8. Stack the cake layers on top of each other.
  9. Cover with the rest of the icing.
  10. Smooth and serve.