Crockpot Tomato Soup

Name: Crockpot Tomato Soup
Prep time: 10 min
Cook time: 5 min
Total time: 5 min
Ingredients: 1 tablespoon extra-virgin olive oil; 2 medium yellow onions (chopped (about 3 cups)); 3 cloves garlic (minced (about 1 tablespoon)); 1 can whole plum tomatoes ((28 ounces) with juices); 3 cups reduced-sodium chicken broth (or vegetable broth); 2 teaspoons kosher salt; 1 teaspoon hot Hungarian paprika; 1/2 teaspoon ground black pepper; 1/3 cup whole wheat orzo; 1/4 cup half-and-half (optional, see recipe notes); freshly grated Parmesan cheese, chopped fresh basil or parsley (Optional for serving)

This Crockpot Tomato Soup is bright and velvety with deep tomato flavor from whole plum tomatoes, a savory backbone of golden caramelized onions, and a whisper of hot Hungarian paprika. It finishes with tender orzo and an optional splash of half-and-half for added creaminess.

Most of the work is hands-off in a 5‑quart (or larger) slow cooker — about 5 hours on low or 2 to 3 hours on high — and the soup is perfect for a relaxed weeknight dinner, easy make-ahead lunches, or ladling into bowls with a sprinkle of Parmesan and chopped basil.

Why You’ll Love This Soup

This slow-cooker version builds deep, concentrated tomato flavor from long, hands-off simmering and a base of golden caramelized onions; for a creamier, classic take, see Tomato Soup — The Best Classic Creamy Recipe.

Hands-off slow-cooker convenience: set it and forget it (use a 5‑quart or larger slow cooker).
Caramelized onions give the soup a sweet, savory backbone that raw onions can’t match.
Orzo turns the soup into a hearty, bowlable meal without adding separate sides.
Half-and-half is optional: add it for a richer finish or omit for a lighter soup.

The recipe combines simple pantry ingredients with a little patience at the stove (for the onions) and a short finishing step in the slow cooker, so the result tastes much more developed than the effort suggests.

Ingredients You’ll Need

1 tablespoon extra-virgin olive oil: Extra-virgin olive oil is used to sauté the onions; it provides the cooking fat that helps the onions brown and adds subtle fruitiness to the base.
2 medium yellow onions, chopped (about 3 cups): Yellow onions supply the sweet, caramelized backbone of the soup — chop them evenly so they cook to golden brown and very tender as instructed.
3 cloves garlic, minced (about 1 tablespoon): Garlic adds aromatic depth; it’s added near the end of the sauté so it cooks briefly and stays fragrant without turning bitter.
1 can whole plum tomatoes, (28 ounces) with juices: Whole plum tomatoes (with juices) are the primary tomato component — puréeing them smooth gives the soup body and bright tomato flavor.
3 cups reduced-sodium chicken broth, or vegetable broth: Reduced-sodium chicken broth (or vegetable broth) creates the soup’s liquid base and rounds out acidity from the tomatoes without overpowering them.
2 teaspoons kosher salt: Kosher salt seasons the soup and helps extract sweetness from the tomatoes and onions as the soup cooks.
1 teaspoon hot Hungarian paprika: Hot Hungarian paprika supplies a light smokiness and subtle heat — it’s the recipe’s primary spice character.
1/2 teaspoon ground black pepper: Ground black pepper adds background heat and helps balance the tomato brightness once the soup is finished.
1/3 cup whole wheat orzo: Whole wheat orzo thickens the soup and makes it more filling — note that cooking time can vary by pasta type, so check early.
1/4 cup half-and-half, optional, see recipe notes: Half-and-half is optional and used at the end to add creaminess and a richer mouthfeel if desired.
freshly grated Parmesan cheese, chopped fresh basil or parsley, Optional for serving: Optional toppings — freshly grated Parmesan and chopped basil or parsley — add savory saltiness and fresh herbal brightness at serving.

How to Make It

Heat 1 tablespoon extra-virgin olive oil in a large skillet over medium-low. Add the chopped yellow onions and sauté for 15 minutes, stirring occasionally, until they are golden brown and very tender — don’t rush this step, undercooked onions will taste sharp in the finished soup. Add the minced garlic and cook 1 more minute.
Lightly coat a 5-quart or larger slow cooker with nonstick spray. Transfer the sautéed onions and garlic to the slow cooker. Add the whole plum tomatoes with their juices, 3 cups reduced-sodium chicken broth (or vegetable broth), 2 teaspoons kosher salt, 1 teaspoon hot Hungarian paprika, and 1/2 teaspoon ground black pepper; stir to combine.
Cover and cook on low for 5 to 6 hours or on high for 2 to 3 hours, until the tomatoes are very soft and the flavors have melded.
Purée the soup until smooth using an immersion blender. If you do not have an immersion blender, carefully transfer the soup to a blender or food processor and purée in small batches — vent jars or hold the blender lid ajar and use a towel to protect your hands when blending very hot liquids.
Stir in the whole wheat orzo, then increase the slow cooker heat to high and cook uncovered until the orzo is tender, about 20 to 30 minutes. Stir two or three times while the orzo cooks and begin checking for doneness early (especially if you use regular rather than whole wheat orzo).
Stir in 1/4 cup half-and-half if using for a richer finish. Serve hot, topped with freshly grated Parmesan and chopped basil or parsley as desired.

Caramelize the Onions

Caramelizing onions is the single most important flavor step in this recipe. Cooked slowly, the onions sweeten and develop savory complexity that lifts the tomatoes instead of letting the soup taste one-dimensional.

Aim for a low, steady heat so the onions soften and turn deep golden rather than quickly browning at the edges.

Slice or chop the onions uniformly so they cook at the same rate.
Don’t crowd the skillet — use a pan large enough to let moisture evaporate.
Stir occasionally and listen for a gentle sizzle; adjust the heat if they start to burn.

Orzo Cooking Tips

Orzo is added after puréeing and finishes the soup into a heartier, almost-stew-like texture. Because pasta brands and types differ, the 20 to 30 minute cooking window is a guideline — check early.

If you prefer the orzo less soft, check at 15 minutes. Stirring two or three times prevents the pasta from clumping or settling on the bottom.

Whole wheat orzo generally cooks a bit slower than regular; start tasting earlier with regular orzo.
Keep the slow cooker uncovered while the orzo cooks so excess moisture can evaporate and the texture concentrates.
If the soup becomes too thick as the orzo absorbs liquid, thin with a splash of broth when reheating.

Paprika & Heat Swaps

Hot Hungarian paprika gives this soup a gentle smokiness and subtle heat that complements the tomatoes without overwhelming them. If hot Hungarian paprika isn’t available, you can achieve similar flavor balance with simple swaps.

Adjust swaps to taste: smoked paprika adds smokiness but less heat; cayenne adds heat but not smokiness.

Swap 1 teaspoon hot Hungarian paprika for 1 teaspoon smoked paprika plus a pinch of cayenne for heat.
If you only have cayenne, use sparingly — it’s hotter and lacks the paprika’s rounded flavor.
Omitting paprika entirely yields a straightforward tomato soup that’s still delicious but less smoky.

Quick Tips

Be patient with the onions: Sauté the onions over medium-low until deeply golden and very tender — this 15-minute step builds the sweet, savory base for the whole soup and prevents raw-onion bitterness.

Orzo timing: Orzo cooking time varies: the recipe gives a 20 to 30 minute window once added. If you’re using regular (non‑whole‑wheat) orzo, start checking for doneness earlier.

Blend hot soup safely: Use an immersion blender in the slow cooker when possible. If using a countertop blender, work in small batches and lift the lid vent slightly while holding a towel over it to release steam.

Half-and-half option: Adding half-and-half makes the soup creamier — the recipe note states it will add 80 additional calories to the whole batch, or 20 calories per serving. Omit it for a lighter soup.

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Frequently Asked Questions

Yes — substitute vegetable broth for the reduced-sodium chicken broth called for in the recipe and follow the same method; the slow cooking and caramelized onions still build excellent flavor.

Rewarm gently on the stovetop over medium-low or in the microwave. Refrigerate in an airtight container for up to 1 week. Freeze in a freezer-safe container for up to 3 months and thaw overnight in the refrigerator before reheating.

Yes — if you prefer a chunkier texture, you can skip puréeing. The soups flavor will be the same, but the texture will be more rustic and tomato-forward.

Storage & Make-Ahead

This soup is an excellent make-ahead meal: prepare through the puréeing step, cool, and refrigerate or freeze if desired. Reheat gently and add the orzo at the last minute if you prefer freshly cooked pasta.

Store refrigerated in an airtight container for up to 1 week, or freeze for up to 3 months; thaw overnight in the fridge before reheating.

Equipment

large skillet
5-quart or larger slow cooker
immersion blender
Blender or food processor

Ingredients

1 tablespoon extra-virgin olive oil
2 medium yellow onions chopped (about 3 cups)
3 cloves garlic minced (about 1 tablespoon)
1 can whole plum tomatoes (28 ounces) with juices
3 cups reduced-sodium chicken broth or vegetable broth
2 teaspoons kosher salt
1 teaspoon hot Hungarian paprika
1/2 teaspoon ground black pepper
1/3 cup whole wheat orzo
1/4 cup half-and-half optional, see recipe notes
freshly grated Parmesan cheese, chopped fresh basil or parsley Optional for serving

Instructions

Heat the extra-virgin olive oil in a large skillet over medium-low heat. Add the chopped yellow onions and sauté for 15 minutes, stirring occasionally, until golden brown and very tender. Add the minced garlic and cook 1 more minute.
Lightly coat a 5-quart or larger slow cooker with nonstick spray. Transfer the sautéed onions and garlic to the slow cooker. Add the whole plum tomatoes with their juices, reduced-sodium chicken broth, 2 teaspoons kosher salt, 1 teaspoon hot Hungarian paprika, and 1/2 teaspoon ground black pepper; stir to combine.
Cover and cook on low for 5 to 6 hours (or on high for 2 to 3 hours), until the tomatoes are very soft.
Purée the soup until smooth with an immersion blender. If you do not have an immersion blender, carefully transfer the soup to a blender or food processor and purée in small batches.
Stir in the whole wheat orzo, then increase the slow cooker heat to high and cook uncovered until the orzo is tender, about 20 to 30 minutes, stirring two or three times and checking the orzo for doneness. Stir in the half-and-half, if using, and top with freshly grated Parmesan and chopped basil or parsley as desired.

Notes

*Hot Hungarian paprika can be found in the spice section of many grocery stores and onlinehere. It gives the soup a rich, light smokiness and subtle heat. If you can’t find it, try substitutingsmoked paprikaand a pinch ofcayenne pepper. You can also use only cayenne or omit it from the recipe entirely. It won’t have quite as much flavor but will still be delicious.

If you use regular versus whole wheat orzo in the recipe, please note that your pasta cooking time may vary. I suggest checking it early.

FOR A RICHER SOUP: I do typically make this soup with the half-and-half, but on the day I shot the photos, I forgot to stir it in! It turned out to be a happy accident, as I learned the soup is still delicious without it. For a lighter soup, you can omit it. For a more creamy, comforting soup, go ahead and add it in. (It will add 80 additional calories to the whole batch, or 20 calories per serving.)

Don’t rush the onion saute! It’s important that they turn golden brown and are very tender. If you add them before they are fully cooked, their raw taste will create an off flavor in the soup.

TO STORE: Refrigerate soup in an airtight storage container for up to 1 week.

TO REHEAT: Rewarm soup gently in a pot on the stovetop over medium-low heat or in the microwave.

TO FREEZE: Freeze leftovers in an airtight freezer-safe storage container for up to 3 months. Let thaw overnight in the refrigerator before reheating.