Roasted Red Pepper and Tomato Soup

Quick tomato soups have always been one of my favorite comfort foods, and this time I upped the game with a jar of roasted red peppers and a butter-and-flour roux to give the soup extra body and richness. I love the simplicity of this Roasted Red Pepper and Tomato Soup. Alls you need is a loaf of crusty French bread for dipping and you’ve got a simple, yet luxurious meal.

A bowl of roasted red pepper tomato soup with a piece of pesto toast dipped in the side

Make it Creamy, or Not

I finished off this soup with a cup of whole milk for a little extra creaminess, but honestly, I tasted it before the milk and it was still a really bangin’ soup. So, if trying to avoid dairy milk, you can just leave the milk out. But don’t skip the butter because the butter actually makes a huge difference here. If you must use olive oil or a non-dairy butter substitute.

Do I Need a Food Processor?

You can make this recipe without a food processor. A good blender or an immersion blender will work just fine, it just so happens that I didn’t have either, so I needed to use my food processor. If you have an immersion blender you can blend everything right in the soup pot. If you have a regular blender, I suggest blending the ingredients cold, like I did in the food processor, and then adding them to the soup pot to avoid having to blend hot ingredients (that can be very dangerous).

How to Serve Roasted Red Pepper Soup

You definitely want some sort of crusty bread, crouton, grilled cheese, or Pesto Cheese Toast to dip into this awesome soup (pictured with plain pesto smeared toast). I don’t have a recipe for the pesto toast, but I just mixed a little extra olive oil into the pesto to make it more spreadable, coated slices of my French bread, then baked at 400ºF for 7-8 minutes.

A piece of pesto toast dipped into a bowl of roasted red pepper and tomato soup.

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4.6 from 35 votes

Roasted Red Pepper and Tomato Soup

A little butter and flour go a long way towards making this Roasted Red Pepper and Tomato Soup extra rich and luxurious. 
Prep Time: 10 mins
Cook Time: 15 mins
Total Time: 25 mins
Servings: 4 (1.5 cups each)


  • 2 Tbsp butter ($0.22)
  • 1 yellow onion ($0.40)
  • 4 cloves garlic ($0.24)
  • 2 Tbsp all-purpose flour ($0.02)
  • 2 15oz. cans crushed tomatoes ($1.38)
  • 1 12oz. jar roasted red peppers ($2.49)
  • 2 cups vegetable broth* ($0.26)
  • 1/4 tsp dried basil ($0.03)
  • 1/8 tsp dried thyme ($0.02)
  • Freshly cracked black Pepper ($0.05)
  • 1 cup whole milk (optional) ($0.30)


  • Dice the onion and mince the garlic. Add the onion, garlic, and butter to a large soup pot. Sauté over a medium flame until the onions are soft and transparent (about 5 minutes).
  • Add the flour to the pot and continue to stir and cook for 1-2 minutes. The flour will form a paste with the butter and onions and begin to coat the bottom of the pot. As soon as the flour that is stuck to the pot begins to turn slightly golden, remove it from the heat.
  • Add the crushed tomatoes (with juices), roasted red peppers (without juices) and the flour paste from the soup pot to a food processor or blender. Blend until smooth, then return the contents to the soup pot.
  • Add the vegetable broth, basil, thyme, and some freshly cracked pepper (10-15 cranks of a pepper mill) to the soup and stir to combine. Heat and stir over a medium flame until the soup begins to simmer. Use the spoon to help dissolve any flour stuck to the bottom of the pot as you stir.
  • Once the soup begins to simmer, turn off the heat. Add the milk, if using, and stir to combine. Taste and add salt if needed (this will depend on the salt content of your broth).


*I use Better Than Bouillon soup base to make my broth.
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Serving: 1.5 cupsCalories: 240.8 kcalCarbohydrates: 34.48 gProtein: 6.6 gFat: 7.85 gSodium: 1020.35 mgFiber: 4.3 g
Nutritional values are estimates only. See our full nutrition disclaimer here.

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Overhead view of a bowl of Roasted Red Pepper and Tomato Soup garnished with parsley, pesto toast on the side

How to Make Roasted Red Pepper Soup – Step by Step Photos

Onions garlic and butter cooking in the soup pot

Dice one yellow onion and mince four cloves of garlic. Add them to a soup pot along with 2 Tbsp butter. Sauté over medium heat until the onions are soft and transparent (about five minutes).

flour added to butter, onions, and garlic in soup pot

Add 2 Tbsp flour and continue to stir and cook. The flour will form a paste, but just keep stirring and cooking. It will begin to coat the bottom of the pot, and as soon as it starts to turn even a  little bit golden (like in the top left of the photo), turn off the heat. 

Roasted Red Peppers jar and can of Crushed Tomatoes

Remove the peppers from the liquid in a 12oz. jar of roasted red peppers. Add the peppers and TWO 15oz. cans of crushed tomatoes to a food processor or blender (don’t drain the tomatoes).

red peppers, tomatoes, garlic, and onion In Food Processor

Also add the floury paste & onions from the soup pot.

Vegetables Blended Smooth in food processor

Now blend that up until it’s smooth. Since most of those ingredients were room temperature, this was a totally safe operation. Yay!

Herbs added to soup pot

Now transfer the soup back to the pot and add 2 cups vegetable broth, 1/4 tsp dried basil, 1/8 tsp dried thyme and some freshly cracked pepper (10-15 cranks of a pepper mill).

Side view of hot soup in the pot, steam rising off the top

Bring the soup up to a simmer over medium heat.

Milk being poured into the soup pot

If you want a lil’ extra creaminess, stir in a cup of milk. Now, heat + acid (from the tomatoes) can cause the milk proteins to seize up a bit and look grainy, but if you keep stirring it blends in. Finally, taste the soup and add a little salt, if needed. I didn’t add any to mine, but the Better Than Bouillon that I use to make my broth usually provides enough salt for me. 

Side view of a bowl of roasted red pepper and tomato soup, a piece of pesto toast dunked in the side

And that’s that. A quick, rich, comforting Roasted Red Pepper and Tomato Soup. Now give that soup something to dip with. Grilled cheese? Pesto toast? Croutons? Goldfish crackers? What’s your favorite thing to top tomato soup with?

Roasted Red Pepper and Tomato Soup is a fast and rich weeknight comfort food perfect for dipping crusty bread or grilled cheese. -