Allow milk to warm to room temperature.

Melt butter in a saucepan over medium heat.

Sprinkle flour over melted butter while stirring to form a roux. Then cook for several minutes.

Gradually add milk to roux while whisking to form a well blended mixture.

Cook about 5 minutes until thickened.

Gradually add in the cheese while stirring constantly until it is melted and smooth.

Serve hot.

If you would like to spice things up add 2 teaspoons hot sauce and 1 teaspoon chili powder.