Once the mixture has chilled, form it into patties. I like to make large patties to match the size of the buns I am using. You should be able to make 10 patties. Let the patties chill for 30 minutes in the fridge.
You can use either whole black beans or refried beans. If you want the beans to maintain some of their texture, use canned black beans. If you want the burgers to have a more consistent texture, use refried beans. I opted to use refried beans. This recipe makes 8-10 veggies – plenty for a party! Or you can freeze cooked veggie burgers and eat them later.