Lemon Blueberry Cupcakes

INGREDIENTS

1/2 cup

unsalted butter

1 cup

granulated sugar

2 tbsp

lemon zest (use 1 tbsp for less strong lemon flavor)

large egg whites

1 tsp

vanilla extract

1 1/2 cups

cake flour (not self rising)*

2 tsp

baking powder

1/4 tsp

salt

3 tbsp

fresh lemon juice

1/2 cup

plain Greek yogurt, I recommend using full fat

1 1/3 cups

blueberries (fresh or frozen)

3/4 cup

unsalted butter, soft

3 cups

powdered sugar

1 tbsp

whipping cream, as needed