Ingredients
Equipment
Method
- In a large bowl, combine ground beef, breadcrumbs, egg, onion soup mix, Worcestershire sauce, garlic powder, and black pepper. Gently mix until just combined.
- Form the mixture into 6-8 oval patties, about 3/4 inch thick, with a slight indent in the center.
- Place sliced onions and mushrooms in the bottom of the slow cooker.
- Arrange patties over the vegetable layer, ensuring they don't overlap.
- Whisk together beef broth and brown gravy mix until smooth. Pour over the patties.
- Cover and cook on low for 4-6 hours, avoiding frequent lid lifting.
- In the final 30 minutes, mix cornstarch with cold water to create a slurry and stir into the cooking liquid.
- Stir in butter during the last 5 minutes for glossy gravy.
Notes
Gently mix patties to avoid toughness. Use a vegetable base to prevent sticking. Avoid frequent lid lifting to maintain cooking consistency. Store leftovers refrigerated for up to 4 days or frozen for up to 3 months, reheating gently with a splash of broth.