01 -
Melt butter in pot, whisk in flour.
02 -
Cook butter-flour mixture for 1 minute.
03 -
Gradually whisk in milk.
04 -
Simmer until thickened.
05 -
Remove from heat.
06 -
Add cheese gradually, stirring until melted.
07 -
Season with salt and chili powder.
08 -
Adjust thickness with milk if needed.