Old-Fashioned Scalloped Potatoes - cooking recipe

Ingredients

3 Tbsp. butter
3 Tbsp. flour
1 1/2 tsp salt
1/4 tsp. pepper
3 C. milk
9 medium potatoes
2 Tbsp. minced onion
1 1/2 C. American cheese

Preparation

In 2 quart saucepan over medium heat, melt butter.
Stir in flour, salt and pepper until blended; continue cooking 2 minutes, stirring constantly.
Gradually stir in milk and cook until sauce is thickened and smooth stirring constantly.
Remove from heat and set aside; stirring occasionally to keep skin from forming on sauce surface.