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Crockpot French Onion Beef Stew

This hearty Crockpot French Onion Beef Stew combines tender, slow-cooked beef with deeply caramelized onions in a rich, savory broth, topped with cheesy baguette for a comforting meal reminiscent of classic French Onion Soup.
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Prep Time 30 minutes
Cook Time 8 hours
Total Time 8 hours 30 minutes
Servings: 6 servings
Course: Main Course
Cuisine: American, French
Calories: 550
Ingredients Equipment Method Notes

Ingredients
  

For the Beef and Seasoning
  • 2.5 lbs beef chuck roast cut into 1.5-2 inch cubes
  • 1 tbsp olive oil
  • 1 tsp salt
  • 1/2 tsp black pepper
  • 1/4 cup all-purpose flour
For the Stew Base
  • 4 large yellow onions thinly sliced
  • 2 tbsp unsalted butter
  • 2 cloves garlic minced
  • 1/2 cup dry red wine such as Merlot or Cabernet Sauvignon (optional, but recommended)
  • 4 cups beef broth low sodium
  • 1 tbsp Worcestershire sauce
  • 1 tsp fresh thyme chopped (or 1/2 tsp dried)
  • 1 bay leaf
For Serving (Optional Topping)
  • 6 slices baguette 1/2-inch thick
  • 1 cup Gruyere cheese shredded
  • 2 tbsp fresh parsley chopped, for garnish (optional)

Equipment

  • 6-quart (or larger) Slow Cooker
  • Large Skillet or Dutch Oven
  • Cutting Board
  • Sharp Knife
  • Cheese grater (optional)
  • Baking Sheet

Method
 

  1. Pat beef chuck cubes dry with paper towels. In a large bowl, toss the beef with salt, pepper, and flour until evenly coated.
  2. Heat olive oil in a large skillet or Dutch oven over medium-high heat. Sear the beef in batches until browned on all sides, about 2-3 minutes per side. Do not overcrowd the pan. Transfer seared beef to the slow cooker insert.
  3. Reduce heat to medium. Add butter to the same skillet. Add thinly sliced onions and cook, stirring occasionally, for 10-15 minutes until softened and beginning to brown. This initial caramelization adds depth of flavor.
  4. Add minced garlic to the skillet with onions and cook for 1 minute until fragrant. Pour in the red wine (if using) and scrape up any browned bits from the bottom of the pan with a wooden spoon. Let the wine simmer for 2-3 minutes until slightly reduced.
  5. Pour the onion mixture over the beef in the slow cooker. Add beef broth, Worcestershire sauce, fresh thyme, and bay leaf. Stir gently to combine.
  6. Cover and cook on LOW for 7-8 hours or on HIGH for 3.5-4 hours, until the beef is fork-tender.
  7. Towards the end of the cooking time (about 30 minutes before serving), preheat your oven broiler to high. Arrange baguette slices on a baking sheet. Broil for 1-2 minutes per side until lightly toasted.
  8. Ladle the hot stew into oven-safe bowls. Top each serving with a toasted baguette slice, then generously sprinkle with shredded Gruyere cheese. Place the bowls under the broiler for 2-4 minutes, or until the cheese is melted, bubbly, and lightly browned. Watch carefully to prevent burning.
  9. Remove the bay leaf from the stew before serving. Garnish with fresh chopped parsley, if desired. Serve hot with the cheesy baguette topping.

Notes

For an even richer flavor, you can caramelize the onions for 30-40 minutes on the stovetop until deep golden brown before adding them to the slow cooker. This stew freezes well. Allow it to cool completely before transferring to freezer-safe containers. Freeze for up to 3 months. Thaw overnight in the refrigerator and reheat gently on the stovetop or in the microwave. If you prefer a thicker stew, you can create a slurry with 1 tbsp cornstarch mixed with 2 tbsp cold water and stir it into the stew during the last 30 minutes of cooking on high.