Begin by melting the butter in a sauce pan on low heat.

Add flour, salt and pepper, and stir. Continue to heat on medium heat until the mixture starts to thicken and bubble.

Slowly stir in the milk and bring back to a rolling boil. Keep boiling until sauce thickens. About 2 minutes

Optional steps:

You can melt ½-1 Cup of grated cheese into the sauce to make a delicious cheese sauce or add some dill for a nice creamy sauce for veggies.