This coffee chocolate marble cake is rich, soft, and full of flavor.
The mix of espresso, cocoa, and melted dark chocolate gives the loaf a deep taste while keeping the crumb tender and moist.
Preheat the oven to 180°C. Grease and line a loaf pan with baking paper.
Whisk the eggs with the sugar until slightly pale. Add the milk, cooled espresso, vanilla extract, and melted butter. Mix until smooth.
Stir in the flour and baking powder until just combined. Do not overmix, so the cake stays soft.
Divide the batter into two bowls. In one bowl, add the cocoa powder, instant coffee, and melted dark chocolate. Mix gently until evenly combined.
Alternate spoonfuls of the plain and chocolate coffee batters in the loaf pan. Swirl lightly with a knife to create a marbled effect.
Bake for 40 to 45 minutes, or until a toothpick inserted in the center comes out mostly clean. Let the cake cool before slicing.
This marble cake is a satisfying homemade bake when you want something between a classic loaf and a richer dessert.
The coffee and chocolate combination makes it especially good for afternoon treats with tea, coffee, or milk.