Heat evaporated milk over medium-high heat in a small saucepan. Stir in the cornstarch and whisk to combine.
1 tbsp cornstarch
Once simmering (bring it to just before boil—when it starts bubbling up the sides, it's ready), immediately reduce heat to low.
Immediately stir in the cheese in batches, starting with the white American cheese. As you stir in the cheese, increase the heat to medium/low and whisk CONSTANTLY while the cheese melts. Once each batch is melted and creamy, add more. Don't stop stirring—you have to whisk the entire time while adding cheese.
¾ lb. white American cheese
Once done with the white American cheese, add in the shredded mozzarella. Again, whisk CONSTANTLY while the cheese melts, ensuring you have a creamy blend. If you prefer the cheese a bit thicker, add a bit more mozzarella.
4 oz. freshly shredded mozzarella cheese
Once all the cheese is melted, stir in the jalapeños, chili powder, nutmeg, red pepper, and salt and pepper.
2 tbsp chopped canned jalapeños, 1 tsp chili powder, ½ tsp ground nutmeg, 1 tsp red pepper flakes, ¼ tsp kosher salt, ¼ tsp ground black pepper
(Optional) If you want the queso to be a bit browned (as pictured), pour the queso into a skillet and place in the oven. Broil for 3-4 minutes, or until cheese begins to bubble and brown.
Top with cilantro, tomatoes, and more jalapeños if desired.
chopped fresh cilantro, tomatoes, and jalapeños
Serve with tortilla chips and enjoy!