Old-Fashioned Marble Cake Recipe | King Arthur Baking

Ingredients

• 9 tablespoons (128g) unsalted butter, at room temperature, at least 65°F
• 1 1/2 cups (298g) granulated sugar
• 3 large eggs, at room temperature
• 3/4 teaspoon table salt
• 2 1/4 teaspoons King Arthur Pure Vanilla Extract, or the flavor of your choice, to taste (See "tips", below.)
• 1 1/2 teaspoons baking powder
• 3/4 cup (170g) milk, at room temperature
• 2 1/4 cups (270g) King Arthur Unbleached All-Purpose Flour
• 6 tablespoons (32g) Dutch-process cocoa
• 2 1/3 tablespoons (32g) butter, melted
• 3/4 teaspoon espresso powder, optional
• coarse sparkling sugar, optional