Quick Description
These Crockpot French Onion Beef Sandwiches are unbelievably tender, juicy, and packed with rich onion flavor. Made with just a chuck roast, French onion soup, gravy mix, and butter, this slow-cooked beef shreds effortlessly and turns into the ultimate high-protein comfort sandwich filling—perfect for busy days, family dinners, or meal prep.
Servings & Timing
Serves: 6–8 sandwiches
Prep Time: 5 minutes
Cook Time: 8–10 hours (LOW)
Total Time: ~8–10 hours
Ingredients List
- 1 chuck roast (3–4 lb / 1.5–2 kg)
- 1 can French onion soup (10.5 oz / 300 g)
- 1 packet brown gravy mix
- 1 can water (use the empty soup can)
- 1 stick butter (½ cup / 113 g)
For serving (optional)
- Hoagie rolls or sandwich buns
- Provolone or Swiss cheese
Instructions
-
Add Beef
Place the chuck roast into the crockpot. -
Add Soup
Pour the French onion soup directly over the roast. -
Mix Gravy
Add the gravy mix into the empty soup can.
Fill with water, stir well, and pour over the roast. -
Add Butter
Place the stick of butter on top. -
Slow Cook
Cover and cook on LOW for 8–10 hours until beef shreds easily. -
Shred & Serve
Shred beef with two forks and stir into the sauce.
Serve hot on sandwich rolls.
Nutrition (per serving – beef only, approx.)
Calories: 420
Protein: 42g
Carbs: 6g
Fat: 26g
Fiber: 1g
Sugar: 2g
(without bun or cheese)
Benefits
- Very high in protein
- Minimal prep
- Hands-off cooking
- Great for meal prep
- Crowd-pleasing comfort food
- Rich in iron & B vitamins
Additional Notes
- Trim excess fat for lighter version
- Add sliced onions or mushrooms for extra flavor
- Use low-sodium soup if preferred
- Toast buns for best texture
Dietary Info
High-Protein: ✅
Gluten-Free Option: ⚠️ (use GF gravy mix & soup)
Low-Carb Option: ✅ (serve without bread)
Keto Option: ⚠️ (check soup/gravy carbs)
Dairy-Free Option: ❌ (contains butter)
Brief Introduction
If you love meals that taste like you cooked all day—but barely lifted a finger—this recipe is for you. The slow cooker does all the work, turning simple ingredients into rich, shredded beef perfection.
Step-by-Step Cooking Guide
Add roast → Pour soup → Mix gravy + water → Add butter → Slow cook → Shred → Serve
Ingredient Details & Substitutions
Chuck Roast: Best for shredding; brisket or bottom round also work
French Onion Soup: Any brand; low-sodium preferred
Butter: Adds richness; substitute olive oil for lighter version
Gravy Mix: Beef or onion flavor both work
Recipe Variations & Serving Suggestions
Variations
- Add provolone for French-dip style
- Add pepperoncini for tang
- Make sliders for parties
- Serve over mashed potatoes or rice
Serve With
- Roasted potatoes
- Simple salad
- Coleslaw
- Pickles
Storage & Make-Ahead
Refrigerate: up to 4 days
Freeze: up to 2 months
Reheat: stovetop or microwave with extra sauce
FAQs
Can I cook on HIGH?
Yes, 4–5 hours on HIGH.
Can I use a smaller roast?
Yes, reduce cooking time slightly.
Is this good for weight loss?
Yes—high protein keeps you full (watch portions and bread).
Can I use chicken instead?
Yes, use chicken breasts for 6–7 hours LOW.
Optional Personal Story
This is one of those recipes I make when I know I’ll be busy all day. Walking into the smell of onion beef after hours of slow cooking never gets old.
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