Basic White Sauce (microwave)

Quite easy. I use this when I make scalloped potatoes.

3 - 4 tbs unsalted butter
3 - 4 tbs flour
1 cup of milk

Microwave butter on high for 30 seconds in 2 cup measuring cup. Blend in flour. Slowly add milk, blending well. Microwave on high for 1 min. Stir. If not thick enough, microwave on high for 30 more seconds.