This gluten-free blueberry protein breakfast cake is the make-ahead breakfast your busy mornings have been waiting for. It's soft, lightly sweet, and loaded with juicy blueberries — and with a full half cup of protein powder baked right in, it actually keeps your family full. Made with just a handful of simple ingredients and one bowl, it comes together in minutes and stores beautifully in the fridge all week. Slice it, serve it, and feel good about what you're putting on the table — even on the most hectic of mornings.