Note: I typically pressure-cook my own beans, but if you're strapped for time and want to use a can of beans, feel free. I've found that most 15 oz cans contain about 1.5 cups beans, and that's totally fine. You can still use the 1 cup of beans, or if you want to use the whole can, just adjust the salt to your taste at the end. It's a very forgiving template, and it will taste amazing both ways. Just remember to rinse canned beans very well.