Roasted Heirloom Tomato Soup

Published: Oct 5, 2021 · Modified: Feb 28, 2023 by Emily · This post may contain affiliate links · 33 Comments

This Roasted Heirloom Tomato Soup is easy to make and uses up all of those delicious tomatoes in your garden before the end of the season! This soup is creamy, full of flavor, and perfect for those chilly fall days.

Once the air starts to get a little chilly I instantly want warm and delicious soup. Making this Roasted Heirloom Tomato Soup Recipe is so easy and so much better than a canned version. While this recipe calls for heirloom tomatoes, you can use any variety of tomatoes you like. You can also make this soup and freeze some for later so you always have delicious homemade soup ready to go!

If you are looking for more warming soup recipes, check out my Tomato and Orange Soup, Chunky Chicken Tortilla Soup, and my Easy Cioppino Seafood Soup!

Ingredients Needed to Make Roasted Heirloom Tomato Soup

fresh heirloom tomatoes (or regular tomatoes, any variety)
extra virgin olive oil
salt and pepper
fresh garlic cloves
unsalted butter
onion
chicken stock/broth
fresh basil
dried oregano
baking soda
heavy cream

How to Make Roasted Tomato Soup

Drizzle the tomatoes and garlic with olive oil, salt, and pepper and roast on a baking sheet lined with foil at 400°F for 30 minutes.
Melt the butter in a large heavy-bottomed pot like a dutch oven or stockpot over medium-high heat. Place the onions in the butter and cook until translucent and just starting to brown, about 10 minutes.
Add the chicken stock, basil, and oregano and then carefully add the roasted tomatoes and garlic along with all of the juices to the pot as well and stir to combine. Add in the baking soda and continue stirring. After the mixture has come to a boil, reduce the heat and simmer uncovered for 30 minutes.
Pour the soup into a blender (or use your immersion/hand blender) and purée it until nice and smooth.
Return the soup to the pot over low heat and stir in the heavy cream.
Serve in bowls and garnish as desired.

fresh heirloom tomatoes and garlic on a baking sheet — heirloom tomatoes and garlic before roasting

heirloom tomatoes and garlic before roasting

Why do you add Baking Soda to Tomato Soup?

Baking soda is added to tomato soup to neutralize the acid in the tomatoes. Baking soda also helps when adding milk or cream to a soup. The dairy will not curdle if there is baking soda present. When you add the baking soda it will foam and bubble for a minute. Don't worry, it will stop pretty quickly and it doesn't change the flavor.

What are Heirloom Tomatoes?

Heirloom tomatoes are grown from seeds that have been passed down generation after generation. They are chosen from the best tomatoes of the season so you know they are going to taste good! They also haven't been genetically modified and are naturally pollinated so they are as pure as they can be.

Although heirloom tomatoes can look a little strange in shape and color, they taste unbelievable and have so much more flavor than your typical grocery store tomato. Since heirloom tomatoes have become much more popular over the years, you can find them in most grocery stores in the summer and early fall.

fresh heirloom tomatoes in a bowl — heirloom tomatoes from my garden

Can I use regular tomatoes?

You can use regular tomatoes in this recipe. Since heirloom tomatoes are only available in the summer and early fall, it will be harder to find them in the winter and spring.

How to Garnish and Serve this Creamy Tomato Soup

Add a sprinkle of parmesan cheese and fresh basil to the top for an extra burst of flavor.
Serve with a grilled cheese sandwich for the ultimate comfort food experience!
Serve with easy homemade bread like my No-Knead Rosemary Bread or Dutch Oven Sourdough Bread.
Add a dollop of sour cream or Greek yogurt to the top for even more creaminess.
Top off the soup with some toasted breadcrumbs for a crunchy addition.

tomato soup with fresh basil and parmesan cheese on top

How to reduce the calories in this Heirloom Tomato Recipe

Listen, we all know cream and butter make things delicious. And the indulgence is usually worth it. However, there are times when we want a lighter version of our favorite recipes and this Roasted Tomato Recipe is easy to modify. Instead of cooking the onions in butter, you can use your favorite cooking oil like olive oil. And, if you are looking to cut even more calories, skip the cream or substitute it with Greek yogurt or low-fat milk instead. The soup won't be quite as creamy, but it will still be delicious!

How to store and freeze creamy heirloom tomato soup

Store this soup in a sealable container in the fridge for 3-4 days. Or, you can freeze this soup in a freezer-safe container for up to 6 months. Just make sure the soup has completely cooled before freezing and you leave room for the soup to expand in the container.

More Fresh Recipes You Might Like