Zucchini and Yellow Squash Soup (Instant Pot or Stovetop)
Low-Carb Zucchini and Yellow Squash Soup has lots of flavor from rosemary and Parmesan and this tasty soup is perfect to welcome the arrival of fall! This tasty soup can be made in the Instant Pot or on the stove! Use Soups to find more recipes like this one.
This delicious low-carb Zucchini and Yellow Squash Soup with Rosemary and Parmesan is a recipe that has a lot of sentimental value for me. I first made it in 2008 when Lisa of Homesick Texan sent me the link to this recipe on Epicurious.com and told me how delicious it was. And I was making soup back then because I had just gotten braces on my teeth!
Now flash forward six years and I’m still enjoying this Zucchini Soup with my nice straight teeth. Things have changed in six years though, and now I’m building up a collection of Pressure Cooker Recipes on the blog and I’d pull out my Cuisinart Electric Pressure Cooker or my Instant Pot to make the soup more quickly. (affiliate links) Not to worry though, if you don’t have a pressure cooker you can easily make this soup on the stove. It’s still zucchini and summer squash season for a few more weeks, and I think using those summer veggies in a soup is a perfect way to transition into fall (which arrives tomorrow, sob!)
This delicious soup can be made with chicken stock or vegetarian broth, so take your choice on that!
How to Make Low-Carb Zucchini and Yellow Squash Soup:
(Scroll down for complete printable recipe including nutritional information.)
- Chop up an onion, finely chop the rosemary, and mince up a tablespoon of fresh garlic. (You can use dried or frozen rosemary if you don’t have fresh, but be sure to chop it very small so you don’t bite into a big piece of rosemary. And of course fresh herbs are always best!)
- Turn the pressure cooker to Saute (or medium-high heat for a stovetop pressure cooker or soup pot.) Add the olive oil and butter and heat until butter is melted and the pan is hot, then add the onion and cook 3-4 minutes. Then add the finely chopped rosemary, minced garlic, and Italian Herb Blend and cook about 3-5 minutes more.
- Add the chicken or vegetable stock and let it simmer for about 10 minutes, long enough to get the onion/garlic/rosemary flavors into the stock.) Be sure to use the reduced amount of stock if you’re using a pressure cooker. I kept the pressure cooker setting on Saute for this, but on the stove I’d reduce the heat to medium.
- While the stock simmers, chop up the zucchini and yellow squash until you have about 8 cups of diced squash (or slightly less if your pressure cooker won’t hold that much.)
- In the pressure cooker, add the squash, lock the lid in place, choose MANUAL, HIGH PRESSURE and set the time for 5 minutes. The use quick release method to release the pressure. (On the stove add the squash and simmer over medium-low or low heat about 30 minutes, or until the squash is very soft and the flavors are well blended.)
- Here’s how my squash looked after 5 minutes at high pressure.
- Then I used my Immersion Blender (affiliate link)to puree the soup. You could do this in a food processor or blender if you don’t have an immersion blender, but be careful with the hot liquid. (Use the same process to puree the stovetop soup after it’s cooked for about 30 minutes.)
- Then you’ll need to simmer the soup to reduce it until it’s as thick as you’d like, probably about 20 minutes on the stovetop or in the pressure cooker. (I simmered on Saute so it cooked down more quickly.) Here’s how my soup looked after it has been reduced.
- Season to taste with salt and fresh-ground black pepper and serve hot, with plenty of freshly-grated Parmesan to add at the table.
More Soup Recipes to Try:
The BEST Low-Carb Instant Pot Soup Recipes ~ Kalyn’s Kitchen
Seven Zucchini Soup Recipes ~ Soup Chick
Italian Sausage, Zucchini and Macaroni Soup ~ Kalyn’s Kitchen
50 AMAZING Low-Carb Instant Pot Soup Recipes ~ Slow Cooker or Pressure Cooker
Weekend Food Prep:
This recipe has been added to a new category called Weekend Food Prep to help you find recipes you can prep or cook on the weekend and eat during the week!
You can use all olive oil if you don’t want butter. You can use frozen rosemary if you have some. You can also use 2 tsp. finely chopped dried rosemary, but fresh or frozen rosemary will be much better. I use my own homemade chicken stock but you can definitely use canned chicken broth (affiliate link). I used 6 cups of stock and slightly less than 8 cups of diced squash to make this in my electric pressure cooker. You will need about 2 cups more stock for stovetop cooking. Recipe inspired by soup recipe from Epicurious.com. Nutrition information is automatically calculated by the Recipe Plug-In I am using. I am not a nutritionist and cannot guarantee 100% accuracy, since many variables affect those calculations.
Serving Size: 1
Amount Per Serving: Calories: 147Total Fat: 8gSaturated Fat: 2gUnsaturated Fat: 5gCholesterol: 7mgSodium: 855mgCarbohydrates: 7.8gFiber: 4gSugar: 9gProtein: 4g
You can use all olive oil if you don’t want butter. You can use frozen rosemary if you have some. You can also use 2 tsp. finely chopped dried rosemary, but fresh or frozen rosemary will be much better.
I use my own homemade chicken stock but you can definitely use canned chicken broth (affiliate link). I used 6 cups of stock and slightly less than 8 cups of diced squash to make this in my electric pressure cooker. You will need about 2 cups more stock for stovetop cooking.
Recipe inspired by soup recipe from Epicurious.com.
Nutrition information is automatically calculated by the Recipe Plug-In I am using. I am not a nutritionist and cannot guarantee 100% accuracy, since many variables affect those calculations.
Low-Carb Diet / Low-Glycemic Diet / South Beach Diet Suggestions:
Everything used here is a low-glycemic and low-carb ingredient, making this soup great for any low-glycemic or low-carb eating plan. I eliminated potatoes from the soup to make it low in carbs and better for the South Beach Diet. I did use a little butter here for flavor; if you’re following South Beach you could replace the butter with more olive oil if you wish or use even more butter for low-carb or Keto.
Find More Recipes Like This One:
Use the Recipes by Diet Type photo index pages to find more recipes suitable for a specific eating plan. You can also Follow Kalyn’s Kitchen on Pinterest to see all the good recipes I’m sharing there.