This is an incredible recipe that may cause a few family feuds! Flavourwise, chocolate and walnuts go brilliantly together, and the marshmallows give a gorgeous, gooey consistency. Serve the pud hot with creme fraiche or ice-cream.


  • 225g plain 00-type flour

  • 175g unsweetened cocoa powder

  • 100g bitter chocolate, melted

  • ¾ teaspoon baking powder

  • ¾ teaspoon salt

  • 2 large free range eggs

  • 200g caster sugar

  • 200g unsalted butter, melted and cooled

  • 150ml milk

  • 1 teaspoon vanilla essence

  • 125g chopped walnuts

  • 200g demerera sugar

  • 225ml boiling water

  • 150 mini marshmallows


  • 1.

    Preheat the oven to 180c.

  • 2.

    Into a bowl sift together the flour, ½ of the cocoa powder, the baking powder, and the salt. In another bowl whisk together the eggs, the caster sugar, butter, milk, and vanilla, add to the flour and stir the batter until it is just combined. Stir in the walnuts and marshmallows and spread the batter evenly in an ungreased 8-inch-square baking tin.

  • 3.

    In a bowl whisk together the remaining cocoa powder, brown sugar, melted chocolate and the boiling water, pour mixture over the batter, and bake for 35 to 40 minutes. Serve the cake hot with crème fraîche or ice cream.

Nutritional information

Nutritional analysis per serving (4 servings)

  • Energy 2291kj
  • Fat Total 78g
  • Saturated Fat 37g
  • Protein 29g
  • Carbohydrate 410g
  • Sugar 272g
  • Sodium 957mg

Note: The information shown is Edamam's estimate based on available ingredients and preparation. It should not be considered a substitute for a professional nutritionist's advice.

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