5 TBSP butter
4 TBSP Flour
4 cups milk
1 tsp salt
1/2 tsp nutmeg
In medium Saucepan heat the butter over medium low heat until melted. Add flour and stir until smooth. Over medium heat, cook until light golden sandy color, about 5-6 minutes.
Heat milk in a separate saucepan until just about to boil. Add hot milk to butter mixture 1 cup at a time, whisking continuously until smooth. Bring to a boil. Cook 6-7 minutes, stirring constantly then remove from heat. Season with salt and nutmeg.
If not using right away, cover top of sauce with plastic wrap. Leave the edges a little open to allow steam to escape.