Slow Cooker Minestrone Soup

Most slow cooker minestrone turns thin and watery by dinnertime, and I’ve made enough pots over the years to know why. The fix is a Parmesan rind, which slowly seasons the broth all day and gives it a deep, savory taste. Better yet, it takes less time to chop than to make your morning coffee. 

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• Ingredients
• Top Tips for Making Minestrone Soup
• How to Make Slow Cooker Minestrone Soup
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In Milan, farm families made minestrone as a cheap vegetable soup in the early 1800s. In 1855, Pellegrino Artusi ordered a bowl at an inn in Livorno, then spent the whole night with awful stomach pains.

The real culprit turned out to be cholera, so he still put minestrone in his 1891 cookbook. Of course, such a good soup didn’t stay in Italy for long.

The soup really took off in America after about five million Italians moved there between 1876 and 1930. Minestrone soon became a regular on Italian-American restaurant menus, right next to spaghetti marinara and eggplant parmesan.

By the 1950s and 60s, Italian food was part of the American diet, and many families made minestrone their own way. Today, I start the classic Italian soup in my crockpot as soon as the weather turns cold.

The broth tastes of tomato and herbs, with a salty, savory depth from the parmesan rind as it melts into the pot. Carrots and celery cook down until soft and slightly sweet. The white beans soften into creaminess while the kidney beans keep their bite. Meanwhile, the ditalini soaks up just enough liquid to make each spoonful filling. Shredded parmesan on top finishes off that Italian flavor. 

When my family wants meatballs in their bowls, I make my Slow Cooker Italian Wedding Soup instead.

My kids eat the pasta first and leave the beans for last, which I gave up fighting a long time ago. My husband likes that a bowl is packed with hearty ingredients, so nobody goes looking for a snack an hour later.

I like that I can toss the lonely zucchini from my fridge drawer into this easy slow cooker minestrone soup. A good minestrone recipe should be that forgiving. 

On nights when my son wants something cheesier, I make Italian Tortellini Soup with Ground Beef for him.

If you’re looking for easy dinner ideas that cook while you’re out, here’s how I put together slow cooker minestrone on a regular weeknight. Everything goes into one pot. The leftovers make a good lunch the next day too.

Ingredients

Start with a Parmesan rind, which melts slowly into the broth and adds a salty, savory depth that salt alone can’t match. The diced tomatoes and tomato paste create a rich, tangy base. Red kidney beans hold their shape and add a meaty bite, while cannellini beans soften and become creamy. Together, they add enough protein to make a hearty meal in a bowl. Plus, green beans add color and freshness. Finally, small ditalini pasta catches bits of vegetables in every spoonful. 

See the recipe card for exact quantities.

How to Make Slow Cooker Minestrone Soup

This hearty slow cooker minestrone is the kind of slow cooker recipe you can start before work and forget about until dinner. It’s an easy soup that takes minimal effort, makes plenty of leftovers, and works for a school-night dinner or a lazy weekend lunch.

Add the Vegetables and Broth

• A 6-quart slow cooker gives you enough room for the beans and pasta later on. Smaller slow cookers can bubble over, so leave about an inch of space at the top.
• Chicken broth or beef broth will make the soup richer, but vegetable broth keeps it vegetarian.

Season the Pot

• The rind can sit right on top. As the soup heats, it softens and slowly adds a salty, savory flavor.
• A teaspoon and a half of Italian seasoning can replace the three dried herbs.
  • A sprig of thyme or a couple of bay leaves also work well, but remove the bay leaves before serving.

Cover and Cook

• Try not to lift the lid, since most slow cookers need about 20 minutes to reheat after each peek.
• Every slow cooker soup cooks a little differently depending on the machine. Older slow cookers and crock pot models tend to run hot, so check yours an hour early the first time.

Add the Beans and Pasta

• Start checking the pasta at 30 minutes. You want it tender with a tiny bit of bite, just past al dente, since it keeps softening in the hot soup.
  • Great northern beans work just as well as cannellini beans, and elbow macaroni can replace ditalini.
  • If you have zucchini on hand, dice it and add it now so it turns tender without falling apart.

Stir in the Spinach and Serve

• Chopped kale works too, but cover and let it cook for about 10 minutes.
• A pinch of crushed red pepper flakes on the grown-ups’ bowls adds a little heat.

Storage

This slow cooker minestrone soup recipe makes six to eight servings, so you'll usually have leftovers. Store them in an airtight container in the fridge for up to four days.

The ditalini keeps soaking up liquid as it sits, which means day-two minestrone is closer to a stew. Reheat it in a large pot over medium heat, not high heat, and add a splash of water to loosen it.

Minestrone freezes well for up to three months. For the best texture, freeze your portions before adding the pasta, since frozen pasta turns mushy once it thaws. When you’re ready to eat, warm the soup on the stove and simmer a small handful of ditalini in it until tender.

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Recipe