In a small mixing bowl, add mashed black beans, chopped jalapeno peppers, chopped onion, salsa, sour cream, salt, pepper, and grated cheese.
1/4 cup sour cream, 1/2 tsp salt, 1/2 tsp pepper, 2 Tablespoons salsa, 1 Tablespoon jalapeno pepper, 1/4 cup onion, 1 cup cheddar cheese