Ingredients
Pound Cake Base
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1 cup unsalted butter, softened
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8 oz cream cheese, softened
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2 ½ cups granulated sugar
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5 large eggs, room temperature
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3 cups all-purpose flour
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¼ teaspoon salt
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1 teaspoon vanilla extract
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½ cup buttermilk
Blue Velvet Swirl
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2 tablespoons unsweetened cocoa powder
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2 tablespoons buttermilk
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Blue gel food coloring
Cream Cheese Glaze
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4 oz cream cheese, softened
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1 cup powdered sugar
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2–3 tablespoons milk or heavy cream
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½ teaspoon vanilla extract
Blue Crumble Topping
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½ cup vanilla cake crumbs or crushed vanilla cookies
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1 tablespoon melted butter
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Blue gel food coloring
Instructions
Preheat oven to 325°F (165°C). Grease and flour a bundt or tube pan thoroughly, making sure all crevices are well coated.
In a large mixing bowl, beat butter and cream cheese together until smooth and creamy. Gradually add sugar and continue beating until light and fluffy.
Add eggs one at a time, mixing well after each addition. Mix in vanilla extract. Gradually add flour and salt, alternating with buttermilk, mixing just until combined.
Remove about 1½ cups of batter into a separate bowl. Stir in cocoa powder, additional buttermilk, and blue gel food coloring until a deep blue color is achieved.
Pour half of the vanilla batter into the prepared pan. Spoon blue velvet batter over it, then top with remaining vanilla batter. Gently swirl with a knife. Bake for 75–85 minutes, or until a toothpick inserted comes out clean. Cool in pan for 15 minutes before turning out.
Notes
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Use gel food coloring for vibrant color without thinning batter.
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Do not over-swirl—distinct ribbons look best.
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Bake low and slow for a moist, even crumb.
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Tent loosely with foil if the top browns too quickly.