Marble Pound Cake

Instructions

1. Prepare the baking pan
   Preheat oven to 325°F (165°C). Grease and flour a 10-inch (25cm) bundt pan or two 9x5-inch loaf pans, ensuring all corners are well coated to prevent sticking.
2. Cream butter and sugar
   In a large mixing bowl, beat the softened butter and granulated sugar with an electric mixer on medium speed until light and fluffy, about 5 minutes. This step incorporates air into the batter, which helps the cake rise properly.
3. Add eggs and vanilla
   Add eggs one at a time, beating well after each addition. Scrape down the sides of the bowl as needed. Mix in the vanilla extract until fully incorporated.
4. Combine dry ingredients
   In a separate bowl, whisk together the flour, baking powder, and salt until evenly distributed.
5. Alternate wet and dry ingredients
   Add the dry ingredients to the butter mixture in three parts, alternating with the milk (beginning and ending with the flour mixture). Mix on low speed just until combined after each addition, being careful not to overmix.
6. Create chocolate batter
   Transfer about one-third of the batter to a separate bowl. Mix the cocoa powder with 2 tablespoons of milk until smooth, then fold this mixture into the separated batter until fully incorporated with no streaks remaining.
7. Create marble effect
   Spoon alternating dollops of vanilla and chocolate batter into the prepared pan. Once all batter is in the pan, use a knife or skewer to gently swirl the batters together with a figure-eight motion. Don't overmix or the marbling effect will be lost.
8. Bake and cool
   Bake for 65-75 minutes, or until a toothpick inserted in the center comes out clean with a few moist crumbs. Let cool in the pan for 15 minutes, then invert onto a wire rack to cool completely before slicing.