Buttermilk marble cake | table&spoon

Ingredients

• 3/4 cup (170 grams) unsalted butter, softened
• 2 1/2 cups (300 grams) cake flour
• 1 1/2 teaspoon baking powder
• 1/2 teaspoon baking soda
• 1/2 teaspoon salt
• 1 2/3 cups (334 grams) sugar
• 1 cup (270ml) buttermilk
• 1 teaspoon vanilla extract
• 3 eggs, slightly beaten
• 1 ounce (28grams) chocolate, best unsweetened or 60% plus
• 1/4 teaspoon baking soda
• 2 tablespoons buttermilk
• 1 tablespoon sugar
• sifted confectioner's sugar, cocoa powder or shaved chocolate for decoration