2 TBSP butter
2 TBSP extra virgin olive oil
1/4 cup whole wheat flour
1 tsp salt
8 oz (about 12) mushrooms, chopped
1 1/2 cups milk
Heat butter and oil over medium heat until butter is melted, then stir in the flour and salt. Add mushrooms and cook for 1 minute, just until softened. Add milk and stir continually until thickened.
Adapted from passionatehomemaking.com