There are many delicious toppings that you can use for nachos, depending on your personal preferences. Here are some popular toppings: Shredded cheese (cheddar, Monterey Jack, or a Mexican blend), Salsa (red or green), Guacamole, Sour cream, Diced tomatoes, Sliced jalapeños or other hot peppers, Black beans, Corn kernels, chopped cilantro, Diced onions, Diced avocado, Pickled jalapeños or other pickled vegetables, Refried beans