There's a famous little cookie shop near UCLA named Diddy Riese, that usually has a line winding halfway down the block. The cookies are great, but they're probably more famous for their $1.75 build-your-own ice cream sandwich. It's such a simple concept: take two fresh cookies and place a heaping scoop of ice cream in between, but they've built a loyal fan base over the past 30 years. Inspired by the dessert, I created a seasonal version with homemade pumpkin ice cream (recipe by Sue Lau), sandwiched between fresh Snickerdoodles (via Cooks Illustrated.) I'm not going to try to oversell these, but you simply need to make them tonight.