INGREDIENTS
For the Very Vanilla Cake
2 1/2 cups
cake flour
3/4 cup
all-purpose flour
1 tbsp
baking powder
1 tsp
baking soda
3/4 tsp
kosher salt
4 oz
(1 stick/115 g) unsalted butter, softened, plus more for the pans
1/2 cup
vegetable shortening, at room temperature
1 3/4 cups
granulated sugar
2 tbsp
pure vanilla extract
1
large egg
1 cup
ice-cold water
1/2 cup
whole milk
1/2 cup
well-shaken buttermilk
1 cup
rainbow sprinkles
3
large egg whites, at room temperature
1/4 tsp
cream of tartar
For the Very Vanilla Frosting
1 1/2 cups
granulated sugar
1/3 cup
all-purpose flour
5 1/2 cups
whole milk
1/3 cup
heavy cream
12 oz
(3 sticks/340 g) unsalted butter, softened but cool, cut into small pieces
1 1/2 tsp
vanilla paste
1 tsp
pure vanilla extract
For Décor
1
to 1 1/4 cups (190 to 240 g) rainbow sprinkles