40g of butter or margarine
40g of flour
1/2 liter of milk (or water)
salt
pepper
40g of butter or margarine
40g of flour
1/2 liter of milk (or water)
salt
pepper
Melt the butter or margarine in a saucepan
When it's foaming, add the flour, mix, then add the milk, salt, and pepper
Bring to a simmer, reducing heat and letting cook for 5 minutes after boiling