Confetti Cake With Buttercream Frosting

INGREDIENTS

For the Cake

2 cups

all-purpose flour

1 1/3 cups

sugar

3 tsp

baking powder

1 tsp

kosher salt

3/4 cup

vegetable shortening

1 1/4 cups

2% or whole milk

1 tbsp

vanilla extract

egg whites

1/2 cup

jimmies or rainbow sprinkles

For the Buttercream Frosting

1 cup

salted butter, at room temperature

1/2 cup

solid vegetable shortening

7 cups

powdered sugar

1/4

to ⅓ cup heavy cream

1 tsp

vanilla extract