Strawberry Lemonade Cupcakes

INGREDIENTS

1 1/4 cups

all-purpose flour

3 tbsp

cornstarch

2 tsp

baking powder

1/4 tsp

salt

1/2 cup

unsalted butter (softened to room temperature)

1 cup

granulated sugar

2 tbsp

lemon zest (freshly grated)

large egg whites ((you can discard the yolks))

1 1/2 tsp

vanilla

1/2 cup

sour cream (room temperature)

3 tbsp

lemon juice (freshly squeezed*)

8 oz

fresh strawberries

3/4 cup

unsalted butter (softened to room temperature)

3 cups

powdered sugar (sifted)

1 tbsp

whipping cream (if needed)