Blackberry Cupcakes with Blackberry Buttercream Frosting

INGREDIENTS

packs blackberries

1/3 cup

milk, at room temperature

large egg whites, room temperature

2 tsp

lemon juice

2 1/4 cups

cake flour, sifted

1 3/4 cups

sugar

4 tsp

baking powder

1 tsp

salt

12 tbsp

unsalted butter (1 1/2 sticks), softened

For the frosting:

2 sticks

butter unsalted butter, softened

1/2 tsp

vanilla

1/4 tsp

almond extract

5 cups

confectioner’s sugar

1 tbsp

meringue powder

salt

1/4 cup

blackberry puree