I have only tried these with a mini muffin pan. If using a full-size muffin pan, they would be very large cookie cups that would take a good amount of frosting to ill and would probably be a very large serving size. If you do want to test it out, please feel free to do so. They may need to bake a little longer though since they'll be bigger and you'll need more dough for each standard-sized muffin cup. The larger cookie cups may make a great 'bowl' to serve ice cream in though.