This decadent Twix cupcakes recipe features a from-scratch recipe for the chocolate cupcakes and a luscious caramel buttercream all topped off with caramel sauce and pieces of Twix. Twix Cupcakes Ingredients: For the chocolate cupcakes: 1 C flour 1/4 C unsweetened cocoa powder 3/4 tsp baking powder 1/2 tsp baking soda 1/2 tsp kosher