Slow Cooker Sausage & Peppers
If you’re looking for an easy, comforting dinner packed with flavor, this Slow Cooker Sausage & Peppers recipe is a perfect choice. Juicy Italian sausages cook slowly with colorful bell peppers, sweet onions, garlic, tomatoes, and Italian seasonings to create a hearty meal that tastes like it has been simmering all day.
The slow cooker makes this recipe especially convenient. Simply prepare the ingredients, add them to the pot, and let everything cook until the sausages are tender and the vegetables have softened into a rich, savory sauce.
Serve the sausage and peppers over pasta, spoon them onto toasted sandwich rolls, or pair them with rice or roasted potatoes. Whether you’re feeding your family on a busy weeknight or preparing an easy weekend dinner, this classic combination is always satisfying.
Why You’ll Love This Recipe
- Easy preparation: A few simple steps are all you need before the slow cooker takes over.
- Juicy, flavorful sausage: Slow cooking allows the sausage to absorb the flavors of the sauce and vegetables.
- Colorful bell peppers: Red, yellow, and green peppers add sweetness, texture, and color.
- Rich tomato sauce: Garlic, onions, and Italian herbs create a delicious, savory base.
- Versatile serving options: Enjoy it with pasta, rice, mashed potatoes, or sandwich rolls.
- Perfect for meal prep: Leftovers are easy to store and reheat.
- Customizable flavor: Choose mild Italian sausage for a family-friendly meal or spicy sausage for extra heat.
Ingredients You’ll Need
For the Sausage and Peppers
- 2 pounds Italian sausage links, mild or spicy
- 3 large bell peppers, assorted colors
- 2 medium yellow onions, sliced
- 4 cloves garlic, minced
- 1 can (28 ounces) crushed tomatoes
- 1 can (8 ounces) tomato sauce
- 2 tablespoons tomato paste
- 1 tablespoon olive oil, optional
- 1 teaspoon Italian seasoning
- 1 teaspoon dried oregano
- ½ teaspoon dried basil
- ½ teaspoon paprika
- ½ teaspoon black pepper
- ½ teaspoon salt, or to taste
- ¼ teaspoon red pepper flakes, optional
- 1 tablespoon balsamic vinegar, optional
Optional Toppings
- Fresh chopped parsley
- Fresh basil leaves
- Grated Parmesan cheese
- Shredded mozzarella cheese
- Extra black pepper
How to Make Slow Cooker Sausage & Peppers
Step 1: Prepare the Vegetables
Wash the bell peppers, remove the seeds and stems, and slice them into strips.
Peel the onions and slice them into thin strips. Mince the garlic.
Using a combination of red, yellow, and green bell peppers creates a colorful dish with a balance of sweetness and mild pepper flavor.
Step 2: Prepare the Tomato Sauce
In a bowl, combine the crushed tomatoes, tomato sauce, tomato paste, Italian seasoning, oregano, basil, paprika, black pepper, and optional red pepper flakes.
Stir until everything is well combined.
Taste the sauce before adding salt, especially if your sausage is already well seasoned.
Step 3: Layer the Ingredients
Place the sliced onions and bell peppers in the bottom of a 5- to 6-quart slow cooker.
Add the minced garlic and spread the vegetables evenly.
Arrange the Italian sausage links on top of the vegetables.
Pour the prepared tomato sauce over the sausages, making sure the ingredients are distributed evenly.
Step 4: Slow Cook Until Tender
Cover the slow cooker and cook:
- LOW: 6–7 hours
- HIGH: 3–4 hours
Cooking times vary depending on the thickness of the sausages and the slow cooker.
The peppers and onions should be tender, and the sausages must reach a safe internal temperature of 160°F (71°C) for pork sausage or the temperature recommended for the specific sausage you use. Poultry sausage should reach 165°F (74°C).
Avoid repeatedly lifting the lid because doing so releases heat and can extend the cooking time.
Step 5: Check the Sauce
Once the sausages are cooked, gently stir the sauce and vegetables around them.
If the sauce is thinner than you prefer, remove the lid for the final 20–30 minutes of cooking, provided your slow cooker instructions allow it.
You can also transfer some of the sauce to a saucepan and simmer it until slightly reduced.
For extra brightness, stir in the optional balsamic vinegar near the end of cooking.
Step 6: Finish and Garnish
Taste the sauce and adjust the seasoning if necessary.
Sprinkle with fresh parsley or basil. For a cheesy finish, add grated Parmesan or shredded mozzarella just before serving.
Allow the mozzarella to melt into the hot sauce for a few minutes if desired.
Step 7: Serve and Enjoy
Serve the sausages whole or slice them into thick pieces.
Spoon plenty of peppers, onions, and tomato sauce over each serving.
Enjoy immediately with your favorite side dish or use the mixture as a filling for warm sandwich rolls.
Tips for the Best Results
Choose Quality Italian Sausage
Mild Italian sausage offers a classic savory flavor, while hot Italian sausage adds extra spice. Either option works well in this recipe.
Choose fresh sausage from a reliable source and follow the package’s cooking and storage instructions.
Cut the Peppers Into Thick Strips
Very thin strips can become overly soft during long cooking. Slightly thicker slices help the peppers maintain some texture.
Layer the Vegetables Under the Sausage
Placing the onions and peppers underneath helps them cook in the flavorful juices released by the sausage.
Don’t Add Too Much Liquid
Bell peppers and onions release moisture as they cook, and the tomatoes provide additional liquid. The recipe usually does not need extra broth or water.
Brown the Sausage for Extra Flavor
Browning the sausage in a skillet before slow cooking is optional, but it can add a deeper, roasted flavor.
If you brown the sausages first, transfer them to the slow cooker and continue with the recipe.
Adjust the Spice Level
For a mild dish, use sweet Italian sausage and omit the red pepper flakes.
For a spicier version, choose hot Italian sausage and add a pinch of red pepper flakes.
Easy Variations
Sausage and Peppers Sandwiches
Place a cooked sausage link in a toasted hoagie roll and spoon the peppers, onions, and tomato sauce over the top.
Finish with Parmesan or melted mozzarella for a hearty sandwich.
Sausage and Peppers With Pasta
Slice the cooked sausages and toss them with the sauce and cooked pasta.
Penne, rigatoni, and spaghetti all work well. Add Parmesan and fresh basil before serving.
Sausage and Peppers With Potatoes
Add small chunks of potatoes to the slow cooker for a more substantial one-pot meal. Keep the pieces relatively uniform and check that they are tender before serving.
Cheesy Sausage and Peppers
Sprinkle mozzarella over the finished dish and let it melt before serving. Parmesan also adds a delicious savory finish.
Spicy Tomato Sausage and Peppers
Use hot Italian sausage and add red pepper flakes or a little extra garlic for a bolder flavor.
Sausage and Peppers Without Tomatoes
If you prefer a lighter, tomato-free version, replace the crushed tomatoes and tomato sauce with a small amount of chicken broth and a drizzle of olive oil. Add the liquid sparingly because the vegetables release moisture as they cook.
What to Serve With Sausage & Peppers
This recipe pairs well with simple sides that complement the rich tomato sauce.
- Spaghetti or penne pasta
- Creamy mashed potatoes
- Steamed white rice
- Roasted potatoes
- Garlic bread
- Toasted hoagie rolls
- A crisp green salad
- Roasted broccoli
- Sautéed green beans
- Parmesan polenta
For a classic Italian-American meal, serve the sausage and peppers with garlic bread and a fresh green salad.
How to Store Leftovers
Let the food cool slightly, then transfer the sausages, vegetables, and sauce to airtight containers.
Refrigerate within 2 hours of cooking and use within 3–4 days.
For the best texture, store the sausage with some of the tomato sauce so it stays moist.
Reheat in a covered saucepan over medium-low heat until thoroughly hot, or use the microwave in short intervals, stirring the sauce as needed. Add a splash of water if the sauce has thickened too much.
Can You Freeze Sausage & Peppers?
Yes. Sausage and peppers freeze well when stored with their tomato sauce.
- Allow the cooked dish to cool.
- Divide it into meal-sized portions.
- Place the sausage, peppers, onions, and sauce in freezer-safe containers.
- Label each container with the date.
- Freeze for up to 3 months for best quality.
Thaw overnight in the refrigerator and reheat until steaming hot throughout. The peppers may be softer after freezing, but the dish should remain flavorful.
Make-Ahead Instructions
You can prepare the vegetables and tomato sauce ahead of time.
Slice the peppers and onions, mince the garlic, and mix the sauce ingredients. Store the prepared components in separate covered containers in the refrigerator.
When you’re ready to cook, add the ingredients to the slow cooker and begin cooking.
You can also make the entire dish a day ahead, refrigerate it promptly, and reheat it gently before serving.
Common Mistakes to Avoid
Adding Too Much Water
The vegetables and tomatoes provide enough moisture for the sauce. Excess liquid can make the finished dish watery.
Overcooking the Peppers
Long cooking softens the peppers considerably. Cut them into thicker strips and check their texture near the end of the cooking time.
Skipping the Temperature Check
Cooking time alone does not guarantee that sausage is fully cooked. Use a food thermometer to check the internal temperature.
Adding Too Much Salt
Sausage can already contain plenty of seasoning. Taste the sauce before adding more salt.
Using the Wrong Slow Cooker Size
A slow cooker that is too small may become overcrowded, while an excessively large one can affect cooking performance. Follow the manufacturer’s filling guidelines, generally keeping the cooker between half and two-thirds full when practical.
Frequently Asked Questions
Can I use chicken sausage instead of Italian pork sausage?
Yes. Chicken or turkey Italian-style sausage can work well. Make sure poultry sausage reaches an internal temperature of 165°F (74°C).
Do I need to brown the sausage before slow cooking?
No. Browning is optional. It adds extra flavor and color, but you can place the sausages directly in the slow cooker.
Can I use frozen sausage?
Thaw sausage safely in the refrigerator before placing it in the slow cooker. Cooking raw frozen sausage in a slow cooker can allow it to remain too long at unsafe temperatures.
Why is my tomato sauce watery?
Peppers and onions release moisture during cooking. Remove the lid near the end if appropriate, or simmer some of the sauce in a saucepan until it thickens.
Can I make this recipe without tomato paste?
Yes. You can omit it, although the sauce may be slightly less concentrated. Allowing the sauce to reduce a little can help deepen its flavor.
Can I use different colors of bell peppers?
Absolutely. Red and yellow peppers are generally sweeter, while green peppers have a slightly more bitter flavor. Use whichever combination you enjoy.
Can I cook this recipe overnight?
You can cook on LOW if the total cooking time fits your schedule and your slow cooker is designed for unattended cooking. Make sure the sausages reach a safe internal temperature, and refrigerate leftovers promptly rather than leaving them at room temperature.
Is this recipe spicy?
It depends on the sausage and optional red pepper flakes. Mild Italian sausage creates a gentle flavor, while hot Italian sausage makes the dish spicier.
Recipe Card
Slow Cooker Sausage & Peppers
Prep Time: 15 minutes
Cook Time: 6–7 hours on LOW or 3–4 hours on HIGH
Total Time: Approximately 6 hours 15 minutes on LOW
Servings: 6
Course: Main Course
Cuisine: Italian-American
Method: Slow Cooker
Ingredients
- 2 pounds Italian sausage links
- 3 bell peppers, sliced
- 2 medium yellow onions, sliced
- 4 cloves garlic, minced
- 1 can (28 ounces) crushed tomatoes
- 1 can (8 ounces) tomato sauce
- 2 tablespoons tomato paste
- 1 teaspoon Italian seasoning
- 1 teaspoon dried oregano
- ½ teaspoon dried basil
- ½ teaspoon paprika
- ½ teaspoon black pepper
- ½ teaspoon salt, or to taste
- ¼ teaspoon red pepper flakes, optional
- 1 tablespoon balsamic vinegar, optional
- Fresh parsley or basil, optional
Instructions
- Slice the bell peppers and onions, then mince the garlic.
- Mix crushed tomatoes, tomato sauce, tomato paste, Italian seasoning, oregano, basil, paprika, black pepper, and optional red pepper flakes.
- Place the onions, peppers, and garlic in the bottom of the slow cooker.
- Arrange the sausage links over the vegetables.
- Pour the tomato mixture over the sausage.
- Cover and cook on LOW for 6–7 hours or HIGH for 3–4 hours.
- Check that the sausage has reached a safe internal temperature and that the vegetables are tender.
- Stir the sauce gently and adjust the seasoning.
- Add balsamic vinegar if desired.
- Garnish with parsley, basil, or Parmesan and serve hot.
Nutrition Information
Nutrition values depend on the sausage variety, serving size, amount of oil, and specific tomato products used.
For the most accurate estimate, calculate the nutrition using the exact ingredients and brands in your kitchen.
Final Thoughts
Slow Cooker Sausage & Peppers is a simple, flavorful dinner that brings together juicy sausage, sweet bell peppers, tender onions, and rich tomato sauce. With very little hands-on preparation, you can create a comforting meal that works for busy weeknights, family dinners, or casual gatherings.
Serve it over pasta, tuck it into toasted sandwich rolls, or enjoy it with garlic bread and a fresh salad. With easy variations and plenty of serving options, this slow cooker classic is one you’ll want to make again and again.