Pinterest Vanilla Cupcakes - 1 1/2 sticks unsalted butter, 1 1/2 cups sugar, 2 eggs, 2 teaspoons pure vanilla extract, 2 1/2 teaspoons baking powder, 1/4 teaspoon salt, 2 1/2 cups flour, 1 1/4 cups milk, amy sedaris 's vanilla buttercream frostingepi: