Step 1

In a medium saucepan whisk together half and half and cornstarch until smooth.

Step 2

Bring to a light boil over medium-high heat stirring constantly. Reduce heat and simmer 30 seconds, stirring constantly, then remove from heat.

Step 3

Immediately stir in cheese and return to low heat and stir to fully melt cheese. Serve warm with tortilla chips for dipping.