I just made some refried beans that were excellent! Unfortunately, I didn't keep track of how much of anything I put in it. As a reminder to myself, here's what I did:
Soaked dried pinto beans 1 hour. Drained.
Put pinto beans, water, salt, and some cut up raw bacon in the crockpot. Cook on LOW about 8 hours. Add cumin and garlic to taste (and more salt if needed). Cook on HIGH 1 hour.
Drain beans, reserving liquid. Mash beans and bacon with potato masher. Add liquid back into the mashed beans until desired consistency is reached.