We've been doing all grain for a few batches, usually 10 gallons at a time. However, we decided on a 5 gallon batch and mashed it up, boiled it, cooled it, and put in the carboy - all serene.
Then, perhaps because we were drinking quite a bit of a previous batch (which tasted marvelous), we threw in a pound of leftover grain in the mash tun, added hot water, and did a second round. We boiled with extra hops but in a reasonable, albeit random, way.
My question: has anybody had success with something like this? If so, what's a good 1-2 punch recipe? I feel like I read about this somewhere - about making a session brew after your original. Maybe not.