INGREDIENTS
!Cupcakes
1 cup
butter, softened
1 1/2 cups
granulated sugar
4
large eggs
2 1/2 cups
all-purpose flour
2 tbsp
corn starch
2 1/2 tsp
baking powder
1/2 tsp
baking soda
3/4 tsp
salt
1 cup
buttermilk
2 tsp
vanilla extract
1/2 cup
sour cream
1 cup
rainbow jimmies sprinkles
!Vanilla Buttercream
2 cups
butter, softened
6 cups
powdered sugar
1/2 cup
heavy whipping cream
1 tbsp
vanilla extract
salt
extra sprinkles (as a topping)