5 large potatoes, peeled & sliced thin
1/2 stick butter
1/4 cup flour
2 1/2 cups milk
6-8 slices American cheese
1/2 tablespoon salt
1/8 teaspoon pepper
1 teaspoon onion powder
Melt butter in saucepan. Stir in flour. Whisk in milk. Heat until bubbly & thickened. Add cheese, salt, pepper, & onion powder. Stir until cheese is melted.
Layer half of the potatoes in a casserole dish that has been sprayed with cooking spray. Add half of the sauce. Repeat layers.
Bake covered at 350 degrees for 45 minutes. Remove cover & bake another 30 minutes.