Place the white American cheese, milk, and butter in a saucepan over low heat. Stir frequently until the cheese is dead melted and the mixture becomes smooth and velvety.

Add diced green chilies, cumin, garlic salt, and a pinch of cayenne pepper. Stir gently until well incorporated. Taste and add more cayenne or cilantro if desired.

If the dip is too thick, gradually pour in more milk while stirring until you reach your preferred consistency.

Transfer the dip to a serving bowl and keep warm. Garnish with diced tomatoes, sliced jalapeños, or a sprinkle of cilantro. For a heartier version, stir in cooked ground beef or sausage.

Serve hot with tortilla chips, warm tortillas, or alongside tacos or grilled meats.