Madeira Sauce

Directions

1. 1
   Make a roux with 1/2 the butter and flour.
2. 2
   Set aside.
3. 3
   In a second pan, saute the onion in the remaining butter.
4. 4
   When the onion begins to wilt, add the mushrooms and cook until they release their liquid.
5. 5
   Add the stock of your choice and the roux and stir well.
6. 6
   Continue to cook until the sauce begins to thicken.
7. 7
   Add Madeira wine and cook until the sauce returns to a boil.
8. 8
   Remove from the heat.