Method
Heat oil in a skillet over medium heat.
Add onion and cook until translucent, about 2-3 minutes.
Add chipotle chili powder, cumin, and garlic and cook until fragrant. About a minute.
Add black beans and garbanzo beans. Cook for about 5 minutes.
With a potato masher or a large fork, mash beans.
Add melted butter and mix thoroughly.
Add orange juice, mix, and serve.