Prepare the Ingredients: Compile all of the cheese sauce's ingredients.Melt Butter: Use a medium saucepan over medium heat to melt the butter.
Add Flour: Stir the flour into the saucepan when the butter has melted. For about two minutes, or until the mixture turns golden brown and begins to smell nutty, whisk constantly.
Add Milk: To prevent lumps, gradually add the milk while whisking constantly. Simmer for 3–5 minutes, or until the sauce begins to thicken somewhat.
Add Cheese: To make a smooth and creamy sauce, add the grated cheddar cheese to the saucepan and stir until the cheese has melted completely.
Season: To taste, add more salt or pepper to the cheese sauce. To evenly integrate the seasoning, give it a good stir.
Serve: as soon as the sauce gets to your desired consistency, remove it from heat and serve immediately over pasta, or vegetables, or use it as a dip for chips or bread.