Gluten Free Lemon Lover's Cupcakes with Lemon Buttercream Frosting I am newly diagnosed w/Celiac and love lemon cake. I added the juice of a whole lemon in addition to the lemon rind. These cupcakes, with the regular lemon frosting, which is gluten free, was so close to the real thing that I had to stop my family from eating them all! I also love the brownie mix. They keep really well in a tupperware in the fridge after making them. I put chopped walnuts in the brownies and they were great for a whole week.