2 1/2 cups sifted cake flour
1 teaspoon baking powder
1 teaspoon salt
2 Tablespoons cocoa powder (unsweetened)
2 oz. red food coloring
1/2 cup unsalted butter, at room temperature
1 1/2 cups sugar
2 eggs, at room temperature
1 teaspoon vanilla extract
1 cup buttermilk, at room temperature
1 teaspoon white vinegar
1 teaspoon baking soda

16 oz. cream cheese (2 packages), softened
1/2 cup unsalted butter (one stick), softened
1 teaspoon vanilla extract
2 1/2 cups powdered sugar, sifted
pinch of salt