In a medium saucepan over medium heat, whisk evaporated milk with the cornstarch until smooth. Continue to cook, stirring occasionally until simmering around the edges. Reduce heat to low and add cream cheese and sour cream, stirring until fully incorporated into the milk and smooth.
1 12-oz. can evaporated milk, 1½ tsp cornstarch, ¼ cup cream cheese, 1 cup sour cream
Stir in the cheese a little at a time and cook until fully melted and smooth. Add the remaining ingredients, stirring constantly. Continue to cook until the consistency is full and smooth. Taste for seasoning or desired spice and add more as desired.
2 ounces sharp cheddar cheese, 2 ounces Mozzarella cheese, 2 ounces Monterey Jack cheese, 1 ounce Swiss cheese, ½ cup diced tomatoes with green chiles, 2 tbsp canned diced jalapeno peppers, 1 tsp fresh lime juice, 1 tsp chili powder, ½ tsp salt, ½ tsp EACH ground cumin, onion powder, garlic powder, ground black pepper, ¼ tsp EACH smoked paprika, cayenne pepper
Serve immediately with tortilla chips and sliced vegetables. Also great poured on nachos, fries, or in burritos and tacos. You may add some fresh toppings to make the dip pretty and for added interest. Fresh jalapeno slices, fresh tomato slices, green onions, extra grated cheese, are all good options.
Leftovers may be kept in the fridge for up to 7 days and reheat nicely. See notes for reheating methods.