There are dinners that are simple, and then there are dinners that feel like a warm hug. This slow cooker 4-ingredient stuffed pepper soup is both. It captures every bit of the classic stuffed pepper experience—sweet bell peppers, savory ground beef, tender rice, and a rich tomato broth—without any of the tedious work. No parboiling peppers. No mixing fillings. No careful stuffing. Just four ingredients, a slow cooker, and a soup that tastes like you spent hours in the kitchen.
This slow cooker stuffed pepper soup is the kind of recipe that becomes a family favorite instantly. It is hearty enough to stand alone as a meal, budget-friendly, and incredibly forgiving. The peppers soften and sweeten as they cook. The rice becomes plump and tender right in the broth. The ground beef adds savory depth. All of it simmers together in a rich tomato base that warms you from the inside out. Serve it with crusty bread or a sprinkle of cheese, and you have a dinner that will earn a permanent spot in your rotation.
Why You Will Love This Recipe
· Only Four Ingredients: Ground beef, bell peppers, diced tomatoes, and beef broth.
· No Pre-Cooking Required: Truly dump-and-go.
· One Slow Cooker, Minimal Cleanup: Everything cooks in one pot.
· All the Classic Stuffed Pepper Flavors: Sweet peppers, savory beef, and rich tomato broth.
· Set It and Forget It: Perfect for busy days when you want dinner ready.
· Budget-Friendly: Uses affordable ground beef and canned tomatoes.
· Great for Meal Prep: Tastes even better the next day.
· Freezer-Friendly: Make a double batch and freeze half.
Ingredients List
· 1 lb (450g) lean ground beef (85/15 recommended)
· 3 large bell peppers (any color), diced
· 2 cans (15 oz each) diced tomatoes, undrained
· 4 cups low-sodium beef broth
· Optional: 1 cup uncooked long-grain white rice (add during last hour)
· Optional: Shredded cheese and fresh parsley for garnish
Step-by-Step Instructions
Step 1: Layer the Slow Cooker
Place the raw ground beef in the bottom of a 6-quart or larger slow cooker, breaking it up into small pieces with a spoon. Add the diced bell peppers. Pour in the diced tomatoes (with their juices) and the beef broth. Do not stir.
Step 2: Cook
Cover and cook on LOW for 6 to 8 hours or on HIGH for 3 to 4 hours.
Step 3: Add the Rice (Optional)
If you want a heartier, more traditional stuffed pepper soup with rice, stir in 1 cup of uncooked long-grain white rice during the last hour of cooking on high (or last 2 hours on low). Cover and continue cooking until the rice is tender.
Step 4: Stir and Serve
Stir the soup well, breaking up any remaining chunks of ground beef. The beef will be fully cooked and tender. Ladle into bowls. Garnish with shredded cheese and fresh parsley if desired. Serve hot.
Cooking Tips and Pro Tips for Best Results
· Use lean ground beef: 85/15 or 90/10 works best. Higher-fat beef (70/30) will release too much grease. If you only have higher-fat beef, brown and drain it first.
· Do not add extra liquid: The diced tomatoes and beef broth provide plenty of liquid. Adding more will make the soup thin.
· Use a variety of bell peppers: Red, yellow, and orange peppers are sweeter than green. A mix adds color and depth of flavor.
· No need to brown the beef: The slow cooker will cook the ground beef thoroughly. If you have an extra 10 minutes, browning adds deeper flavor, but it is not required.
· For a thicker soup: Add tomato paste (2 tablespoons) along with the other ingredients. Or, during the last hour, stir in a cornstarch slurry (1 tablespoon cornstarch mixed with 1 tablespoon water).
· Add rice for a heartier soup: Traditional stuffed peppers include rice. Adding rice makes this soup more substantial and filling. If you add rice, use long-grain white rice; brown rice takes too long, and instant rice can become mushy.
· Do not lift the lid during cooking: Each time you lift the lid, the slow cooker loses heat and adds 15-20 minutes of cooking time.
Variations and Substitutions
Stuffed Pepper Soup with Rice:
Stir in 1 cup of uncooked long-grain white rice during the last hour (high) or last 2 hours (low). This is the most traditional version.
Low-Carb / Keto Stuffed Pepper Soup:
Omit the rice. The soup is naturally low-carb without it. Add 4 oz of cream cheese during the last hour for a creamy, rich texture.
Turkey Stuffed Pepper Soup:
Substitute the ground beef with 1 lb of lean ground turkey. Add 1 tablespoon of olive oil to the slow cooker (turkey is leaner). The flavor is slightly lighter but still delicious.
Spicy Stuffed Pepper Soup:
Add 1 can (10 oz) of diced tomatoes with green chiles (Rotel) and ½ teaspoon of crushed red pepper flakes. Serve with hot sauce and pickled jalapeños.
Italian Stuffed Pepper Soup:
Add 1 teaspoon of dried oregano, 1 teaspoon of dried basil, and 2 cloves of minced garlic. Top with grated Parmesan cheese. The herbs give the soup an Italian twist.
Vegetarian Stuffed Pepper Soup:
Omit the ground beef. Add 2 cans (15 oz each) of kidney beans or lentils (drained and rinsed) and 1 cup of chopped mushrooms. Use vegetable broth instead of beef broth.
Serving Suggestions
This stuffed pepper soup is a complete meal on its own, but these accompaniments make it even better:
· With Crusty Bread or Garlic Toast: Essential for dipping and sopping up the rich broth.
· With a Sprinkle of Cheese: Shredded cheddar, mozzarella, or Parmesan.
· With a Dollop of Sour Cream: Adds tangy creaminess.
· Over Rice: If you did not add rice to the soup, serve it over cooked rice.
· With a Side Salad: A simple green salad with vinaigrette.
Garnishes to try:
· Fresh parsley or basil
· Shredded cheese
· Red pepper flakes
· A squeeze of fresh lemon juice
Storage and Reheating Instructions
Refrigerator:
Store leftovers in an airtight container for up to 5 days. The soup will thicken as the rice (if added) continues to absorb liquid. Add a splash of broth or water when reheating.
Freezer:
Freeze in freezer-safe containers for up to 3 months. If you added rice, the texture may soften, but the flavor remains excellent. Thaw overnight in the refrigerator before reheating.
Reheating:
· Stovetop (Best): Transfer to a saucepan and reheat over medium-low heat for 8-10 minutes, stirring occasionally. Add a splash of broth or water if needed.
· Microwave: Heat individual portions covered for 90 seconds, stir, then heat for another 60 seconds.
Nutritional Information (Approximate, per serving – serves 6, without rice)
· Calories: 280
· Protein: 24g
· Fat: 14g
· Saturated Fat: 5g
· Carbohydrates: 16g
· Fiber: 4g
· Sugar: 10g
· Sodium: 680mg
· Potassium: 820mg
· Vitamin C: 100% Daily Value
· Iron: 15% Daily Value
Add approximately 120 calories per serving if rice is included.
Frequently Asked Questions (FAQ)
1. Do I need to cook the rice before adding it to the slow cooker?
No. Add uncooked long-grain white rice during the last hour on high or last 2 hours on low. The rice will cook perfectly in the broth. Do not add rice at the beginning, or it will become mushy. Do not use instant rice, which can turn to paste.
2. Can I use frozen bell peppers instead of fresh?
Yes. Use about 3 cups of frozen diced bell peppers. Add them frozen; no need to thaw. Frozen peppers are slightly softer than fresh, but they work well in this soup.
3. Why is my soup thin?
Stuffed pepper soup is meant to be brothy, not thick. If you prefer a thicker soup, add 2 tablespoons of tomato paste at the beginning, or stir in a cornstarch slurry during the last hour. Adding rice also naturally thickens the soup.
4. Can I make this soup on the stovetop instead of a slow cooker?
Yes. Brown the ground beef in a large pot. Add the bell peppers, diced tomatoes, and beef broth. Bring to a boil, then reduce heat and simmer for 20-25 minutes until the peppers are tender. If adding rice, stir it in and simmer for another 15-20 minutes until tender.
5. Can I add other vegetables to this soup?
Absolutely. Diced onion, celery, carrots, or mushrooms are excellent additions. Add them at the beginning. Do not add more than 2 cups of extra vegetables, or the soup may become overcrowded.
6. Is this recipe gluten-free?
Yes, as written. Ground beef, bell peppers, diced tomatoes, and beef broth are naturally gluten-free. If using a pre-seasoned broth or adding rice, ensure those products are certified gluten-free. Serve with gluten-free bread or crackers.