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Low Carb Crockpot Beef and Onion Soup

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A rich, slow-cooked low carb soup with tender beef, sweet caramelized onions, and savory herbs. Multipurpose for meal prep or weeknight dinners, this crockpot soup delivers comforting flavor with minimal carbs and no hidden starches.

  • Total Time: 380
  • Yield: 6 servings 1x

Ingredients

Scale

1 lb beef chuck roast or ground beef (70-85% lean)
4 cups unsalted beef broth
1 large yellow onion (about 1.5 cups chopped)
1 clove garlic, minced
1 tsp dried thyme
1 bay leaf
Salt and pepper to taste
1 tbsp olive oil (for browning)
Optional: 2 tbsp tomato paste (for extra depth)

Instructions

Brown beef in olive oil in a skillet until lightly seared
Transfer beef to crockpot and add onions
Pour in beef broth, season with garlic, thyme, bay leaf, salt, and pepper
Cook on low for 6-8 hours
Remove bay leaf before serving

Notes

Browning beef enhances umami flavor
For extra low carbs, use onion greens instead of onion bulb
Tomato paste is optional but adds depth
Serves well with cauliflower rice or keto-friendly bread
Freezes well for up to 3 months

  • Author: Leah
  • Prep Time: 20
  • Cook Time: 360
  • Category: Dinner
  • Method: Slow Cooking
  • Cuisine: American
  • Diet: Low Carb

Nutrition

  • Serving Size: 1 serving (~2 cups)
  • Calories: 320
  • Sugar: 1g
  • Sodium: 1250mg
  • Fat: 15g
  • Saturated Fat: 6g
  • Carbohydrates: 6g
  • Fiber: 0.5g
  • Protein: 28g
  • Cholesterol: 85mg