Black beans in a Mexican style sauce. Heat & serve. Microwave in pouch - 60 seconds. Fast and delicious! Old El Paso Heat & Serve Black Beans is the fast and delicious way to complete your Mexican meal. Made with a perfect blend of seasoning and spices, it's ready to serve right out of the pouch. Microwave for 60 seconds and serve with tacos, or wrap in a tortilla with rice, chicken or beef, cheese and salsa for burritos in an instant.