Flagship Cheese Sauce

4 Tbsp. (½ stick) unsalted butter
1/3 cup all-purpose flour, unbleached
3 cups milk
14 oz Flagship cheddar cheese, grated (about 3½ cups)
2 oz Jack cheese, grated (about ½ cup)
½ tsp. coarse sea salt
½ tsp. chipotle chile powder
1/8 tsp. garlic powder

Melt butter in a heavy-bottomed saucepan over medium heat; whisk in flour. Continue whisking and cooking for 2 minutes.

Slowly add milk, whisking constantly. Cook, stirring frequently, until sauce has thickened, about 10 minutes.

Remove from heat. Add cheeses, salt, chile powder, and garlic powder. Stir until cheese has melted and all ingredients are well incorporated, about 3 minutes.

Use immediately or refrigerate up to 3 days.

To reheat sauce, place in a saucepan over low heat, stirring frequently, until heated through.

Makes about 4 cups.