Cookie Dough Stuffed Cupcakes Ingredients Cupcakes: 1 Betty Crocker Supermoist butter recipe yellow cake mix (and ingredients package calls for) 1 container Betty Crocker chocolate frosting or homemade chocolate frosting For the filling: 1/2 cup (1 stick) unsalted butter, softened to room temp 3/4 cup light brown sugar 1 teaspoon vanilla extract 1 1/4