Let's bake today... and use sour cream to make these homemade Funfetti Cupcakes even more decadent! Instead of using the traditional boxed mix, we'll cream together butter, sour cream, sugar, eggs and pure vanilla extract then add unbleached all-purpose flour, baking powder, milk and rainbow sprinkles to the batter. Dollop them into a cupcake tin before baking for 20 minutes. Once cooled, we'll top them with tart Sour Cream Icing! These cupcakes are a sweet recipe for the weekend baker.