In a pot on medium heat melt Butter, wait for Butter to foam.

Add Onions, saute for 5 minutes. Add Mushrooms, Salt, and Pepper. Simmer for 20 min.

When Water is evaporated from Mushrooms, add Flour, mix continuously for 5 minutes. Add Garlic, then sauté for 30 seconds. Slowly add Vinegar, Beef Bullion, and Chicken Stock, then add Salt, Pepper, Thyme, and Rosemary.

Simmer uncovered for 30 minutes.