Add the milk to the butter and flour, whisk until smooth.
Add the cheese and continue to whisk.
Cheese should be fully melted before proceeding.
Add the chili powder and stir to combine.
Taste the sauce, and add the salt if needed.
Prepare your chips.
Pour the cheese over the chips.
Top with your favorite nacho toppings and serve immediately.
Video
Notes
Please note that the nutrition data is a ballpark figure. Exact data is not possible. This data is for the entire recipe. Divid these numbers by the number of portions you serve.