All-Butter Angel Biscuits have been casually on my radar for a few years now. I love the idea of using both baking powder and yeast to provide the leavening. It's my guess, but I don't know for sure, that these were developed to ensure success. If the baking powder didn't help them to rise, then the yeast would, and vice versa. They're kind of foolproof that way, but you still do have to use a light hand when bringing the dough together. Foolproof sounds promising. Show me these biscuits!