Preheat your oven to 350°F (175°C) and grease two round cake pans.

In a bowl, whisk together cake flour, granulated sugar, baking powder, and salt.

In another bowl, cream the softened butter until fluffy; gradually add in the sugar until light and airy.

Add eggs one at a time, mixing well after each addition; then stir in the vanilla extract.

Combine dry ingredients with wet mixture alternately with milk until smooth.

Divide batter into two bowls; tint one with pink food coloring and gently swirl both batters together.

Pour into prepared pans and bake for 25-30 minutes or until a toothpick comes out clean.

Allow cooling before frosting and serving.