All-Occasion Marble Cake

Ingredients

• • 33 g unsweetened cocoa powder
• • 250 g granulated sugar
• • 115 g unsalted butter, softened
• • 3 pieces eggs
• • 240 ml milk
• • 10 ml vanilla extract
• • 360 g all-purpose flour
• • 10 g baking powder
• • 5 g baking soda
• • 2 g salt
• • 255 g semisweet chocolate chips
• • 50 g unsalted butter, softened
• • 240 g confectioners' sugar
• • 60 ml milk (for frosting)

Instructions

1. Preheat your oven to 350°F (175°C).
2. Lightly grease a 9 x 13-inch baking dish with cooking spray or butter.
3. In a medium mixing bowl, combine the unsweetened cocoa powder, 1/4 cup of granulated sugar, and 1/4 cup of warm water to create a cocoa mixture.
4. In a large mixing bowl, use an electric mixer on medium-high speed to cream the softened butter and the remaining granulated sugar until light and fluffy.
5. Reduce the mixer speed to low and gradually add the eggs, milk, vanilla extract, flour, baking powder, baking soda, and salt to the creamed mixture. Blend until the batter is smooth.
6. Transfer 2 cups of the vanilla cake batter into the cocoa mixture. Stir until well blended.
7. Pour the vanilla cake batter into the prepared baking dish.
8. Spoon the cocoa batter in six puddles on top of the vanilla batter.
9. Use a knife to swirl the batters together, creating a marbled effect.
10. Bake in the oven for 22-25 minutes, or until a toothpick inserted into the center of the cake comes out clean.
11. Let the cake cool completely in the pan on a wire rack.
12. For the frosting, melt the chocolate chips in a double boiler or in a heat-proof bowl set over a pan of simmering water, stirring until smooth.
13. In a medium bowl, use an electric mixer on medium speed to beat the softened butter, confectioners' sugar, and melted chocolate. Gradually add enough milk to achieve a spreadable consistency.
14. Spread the frosting evenly over the cooled marble cake.

Recipe from BakeBot • 11/3/2026