For the vanilla cake
01 -
Baking spray or softened butter and flour, for the pans
02 -
2 1/2 cups (285 g) cake flour, spooned and leveled
03 -
2 teaspoons baking powder
04 -
1/2 teaspoon baking soda
05 -
1/2 teaspoon fine salt
06 -
3/4 cup (170 g) unsalted butter, softened
07 -
1/4 cup (60 ml) neutral oil
08 -
1 3/4 cups (350 g) granulated sugar
09 -
3 large eggs, room temperature
10 -
2 large egg yolks, room temperature
11 -
1 tablespoon vanilla extract
12 -
1 cup (240 ml) buttermilk, room temperature
For the buttercream
13 -
1 1/2 cups (340 g) unsalted butter, softened
14 -
5 cups (600 g) powdered sugar, sifted if lumpy
15 -
2 teaspoons vanilla extract
16 -
1/4 teaspoon fine salt
17 -
2-4 tablespoons heavy cream or whole milk
18 -
1/2 cup rainbow sprinkles, for decorating