This vibrant and flavorful rainbow roasted pepper soup is a feast for both the eyes and the palate. Combining the sweetness of roasted bell peppers with the savory depth of vegetable broth, this soup is perfect for any season. Whether you choose to add a touch of heavy cream for extra richness or enjoy it as is, this dish is sure to become a favorite.
If you don't usually stock up on a variety of bell peppers, you might need to make a special trip to the supermarket. This recipe calls for red, yellow, orange, and green bell peppers, each adding a unique flavor and color to the soup. Additionally, vegetable broth is essential for the base, and while you might have olive oil, onion, and garlic at home, the optional heavy cream can add a luxurious touch.

Ingredients for Rainbow Roasted Pepper Soup
Bell peppers: These colorful vegetables are the star of the soup, providing sweetness and a vibrant hue.
Olive oil: Used for roasting the peppers and sautéing the onion and garlic, adding a rich flavor.
Onion: Adds a savory depth to the soup when sautéed.
Garlic: Provides a fragrant and flavorful base when sautéed with the onion.
Vegetable broth: Forms the liquid base of the soup, enhancing the overall flavor.
Salt: Enhances the natural flavors of the ingredients.
Black pepper: Adds a touch of heat and complexity to the soup.
Heavy cream: Optional, but adds a creamy richness to the final dish.
Technique Tip for This Recipe
To achieve a deeper, more complex flavor in your rainbow roasted pepper soup, consider roasting the bell peppers until they are slightly charred. This caramelizes the natural sugars in the peppers, enhancing their sweetness and adding a smoky undertone to the soup. After roasting, place the peppers in a bowl and cover with plastic wrap for about 10 minutes. This will make peeling the skins off much easier, ensuring a smoother texture in your final dish.
Suggested Side Dishes
Alternative Ingredients
bell peppers - Substitute with poblano peppers: Poblano peppers offer a slightly smoky flavor that can add depth to the soup.
olive oil - Substitute with avocado oil: Avocado oil has a high smoke point and a neutral flavor, making it a good alternative for roasting.
onion - Substitute with shallots: Shallots provide a milder and sweeter taste compared to onions, which can enhance the soup's flavor.
garlic - Substitute with garlic powder: If fresh garlic is unavailable, garlic powder can be used for a similar flavor, though it will be less pungent.
vegetable broth - Substitute with chicken broth: Chicken broth can be used if you are not strictly vegetarian, adding a richer flavor.
salt - Substitute with soy sauce: Soy sauce can add a savory umami flavor along with the necessary saltiness.
black pepper - Substitute with white pepper: White pepper has a slightly different flavor profile and can add a bit of heat without altering the soup's color.
heavy cream - Substitute with coconut milk: Coconut milk provides a creamy texture and a subtle sweetness, making it a good dairy-free option.
Alternative Recipes Similar to This Soup
How to Store or Freeze This Soup
Allow the Rainbow Roasted Pepper Soup to cool completely before storing. This helps prevent condensation, which can lead to a watery soup.
Transfer the cooled soup into airtight containers. For easy portion control, consider using individual serving-sized containers.
Label the containers with the date of preparation. This will help you keep track of how long the soup has been stored.
Store the soup in the refrigerator if you plan to consume it within 3-4 days. The vegetable broth and roasted peppers will maintain their flavor and texture well during this period.
For longer storage, place the airtight containers in the freezer. The soup can be frozen for up to 3 months without significant loss of flavor or quality.
When ready to enjoy, thaw the soup in the refrigerator overnight. This gradual thawing helps preserve the texture of the bell peppers and other ingredients.
Reheat the soup on the stovetop over medium heat, stirring occasionally to ensure even heating. If the soup is too thick after reheating, add a splash of vegetable broth or water to reach the desired consistency.
If you included heavy cream in your soup, be aware that it might separate slightly upon reheating. To remedy this, whisk the soup vigorously or use an immersion blender to restore its smooth texture.
For an extra burst of freshness, garnish the reheated soup with a sprinkle of fresh herbs like parsley or basil before serving.
How to Reheat Leftovers
For stovetop reheating:
- Pour the Rainbow Roasted Pepper Soup into a medium-sized pot.
- Heat over medium-low heat, stirring occasionally to prevent sticking.
- Once the soup begins to simmer, reduce the heat to low and continue to heat until it reaches your desired temperature.
- If the soup has thickened too much, add a splash of vegetable broth or heavy cream to reach the desired consistency.
For microwave reheating:
- Transfer the Rainbow Roasted Pepper Soup to a microwave-safe bowl.
- Cover the bowl with a microwave-safe lid or a microwave-safe plate to prevent splatters.
- Heat on high for 2-3 minutes, stopping halfway to stir the soup.
- Continue heating in 30-second intervals, stirring each time, until the soup is hot throughout.
For oven reheating:
- Preheat your oven to 350°F (175°C).
- Pour the Rainbow Roasted Pepper Soup into an oven-safe dish.
- Cover the dish with aluminum foil to prevent the soup from drying out.
- Heat in the oven for 20-25 minutes, or until the soup is hot and bubbly.
- Stir the soup halfway through the heating process to ensure even reheating.
For slow cooker reheating:
- Pour the Rainbow Roasted Pepper Soup into your slow cooker.
- Set the slow cooker to the low setting.
- Heat for 1-2 hours, stirring occasionally, until the soup is thoroughly heated.
- If the soup is too thick, add a bit of vegetable broth or heavy cream to adjust the consistency.
Essential Tools for Making This Soup
Oven: Used to roast the bell peppers until their skins are charred.
Baking sheet: Holds the bell peppers while they roast in the oven.
Knife: Used to chop the onion and mince the garlic.
Cutting board: Provides a safe surface for chopping the onion and mincing the garlic.
Large pot: Used to sauté the onion and garlic, and to simmer the soup.
Wooden spoon: For stirring the onion and garlic while they sauté, and for mixing the soup.
Blender: Purees the soup until it is smooth.
Measuring spoons: Measures the olive oil, salt, and black pepper.
Measuring cup: Measures the vegetable broth and optional heavy cream.
Tongs: Helps to handle the hot roasted peppers when removing their skins.
Ladle: Used to serve the soup into bowls.
How to Save Time on Making This Soup
Pre-roast the peppers: Roast the bell peppers in advance and store them in the fridge. This way, you can skip the roasting step when you're ready to make the soup.
Use pre-chopped ingredients: Buy pre-chopped onions and garlic to save time on preparation.
Blender efficiency: Use an immersion blender directly in the pot to puree the soup, eliminating the need to transfer hot liquid to a blender.
Batch cooking: Double the recipe and freeze half for a quick meal later. This saves time on future cooking sessions.

Rainbow Roasted Pepper Soup Recipe
Ingredients
Main Ingredients
- 4 bell peppers (red, yellow, orange, and green) seeded and quartered
- 1 tablespoon olive oil
- 1 onion chopped
- 2 cloves garlic minced
- 4 cups vegetable broth
- 1 teaspoon salt
- ½ teaspoon black pepper
- ½ cup heavy cream optional
Instructions
- 1. Preheat your oven to 400°F (200°C).
- 2. Place the bell peppers on a baking sheet and drizzle with olive oil. Roast for 20-25 minutes until the skins are charred.
- 3. Remove the peppers from the oven and let them cool. Peel off the skins and set the peppers aside.
- 4. In a large pot, sauté the onion and garlic until soft.
- 5. Add the roasted peppers, vegetable broth, salt, and black pepper. Bring to a boil, then simmer for 10 minutes.
- 6. Use a blender to puree the soup until smooth. Return to the pot and stir in the heavy cream if using.
- 7. Serve hot and enjoy!
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