In a large bowl, combine the black beans, grated onions, minced garlic, chipotle sauce, soy sauce, and cumin. Season with a pinch of salt and black pepper. Use a fork or a potato masher to mash the mixture until it holds together. You'll want a chunky texture, so don't overdo it!
Add the whisked egg to the mixture and fold in the panko breadcrumbs. This will help bind everything together and create a nice consistency for your patties.
Form the mixture into 2 patties with your hands. I like to make them about an inch thick for the perfect bite. Chill them in the fridge for at least 10 minutes; this helps them firm up.
Heat the olive oil in a skillet over medium heat. You want it hot, but not smoking. Add the black bean patties to the skillet.
Cook them for about 5 minutes on one side until they are golden brown and have a nice char. Flip them carefully using a spatula.
After flipping, cook for another 5 minutes on the other side. They should be crispy and cooked through. Feel free to press them gently with the spatula for an extra crunchy exterior.
Once the patties are cooked, remove them from the skillet and place each patty in a hamburger bun. Top them with your favorite toppings—lettuce, tomato, avocado, or even some salsa work beautifully!
Serve hot and enjoy your homemade Best Black Bean Burger Recipe with a side of fries or a fresh salad.