For all of you waiting with baited breath for the next installment in the “Gluten Free Costco Muffin” saga, the time is now. I give you: the giant gluten free Costco copycat double chocolate muffin in all its chocolatey glory. It’s HUGE, it’s DOUBLE the chocolate, it’s fluffy and moist, and it’s dang easy to make which makes these the most dangerous chonky muffins out there. Each giant muffin is the equivalent of four regular-sized muffins, so be wary of the “I’ll just have two” urge that will wash over you once these come out of the oven. I finished making the first test batch of these just after 10pm…