4 cubes chicken bouillon
4 cubes beef bouillon
2 cups boiling water
1 cup dry red wine
1 teaspoon dill weed
1 teaspoon Worcestershire sauce
1 teaspoon garlic powder
4 pounds fresh mushrooms
1/2 cup butter, or more as needed
1. Dissolve chicken and beef bouillon cubes in boiling water in a bowl; stir well. Add red wine, dill, Worcestershire sauce, and garlic powder; stir to combine.
2. Arrange mushrooms in the bottom of a slow cooker. Pour broth mixture over mushrooms; top with butter.
3. Cook on Low for 12 hours.