Preheat oven to 425 F.
Mix 3 tbsp chickpea flour with 3 tbsp water. Set aside.
Peel and chop the sweet potatoes into 1 inch cubes. Then boil the sweet potatoes for about 20 minutes or until they are just soft enough to stab with a fork. Avoid over cooking, as you don't want the sweet potatoes to be too soft or else the burgers won't hold together.
Once sweet potatoes are done cooking, boil the canned black beans for about 5 minutes to soften.
Then in a medium bowl, mash the sweet potatoes and black beans together.
Chop up the onion into small dices, and add that into the bowl. Mix well.
Add in the chickpea flour mixture, buffalo sauce, olive oil, salt, paprika, garlic, and onion powder.
Spray a baking sheet with olive oil. Then form the sweet potato mixture into 6 1-inch thick patties. Place on the baking sheet.
Bake for 25 minutes, flip, then bake for another 25 minutes. Serve and enjoy!