To a medium sized saucepan, add the cheese and toss it with the cornstarch over low heat.
Slowly pour in the evaporated milk, whisking constantly, until incorporated.
Continue to whisk for several minutes, until the cheese is fully melted and bubbly.
Stir in the diced jalapenos.
Serve immediately with tortilla chips, pretzels, or veggies.
Notes
This recipe makes about 3.5 cups of sauce. You want to plan at least ¼ cup for each guest if serving for a party.Alternatives to jalapeños - diced green chiles, teaspoon of chili powder, pinch of cayenne or a few dashes of hot sauce.Storage: Let the sauce cool a bit before storing in an airtight container in the fridge. It will stay fresh for 2-3 days.Reheating: You can reheat in the microwave, stirring every 20-30 seconds, or over low heat in a small saucepan.