Slow Cooker Vegan Hamburger Soup (15g Protein)

Slow Cooker Vegan Hamburger Soup is homestyle comfort food made entirely plant-based. Pantry-friendly TVP (pea-based or soy-based) replaces the hamburger in this hearty, vegetable-packed soup with potatoes, fire-roasted tomatoes, green beans, kale, and fragrant Italian seasoning. It is vegan, gluten-free, grain-free, oil-free, wonderfully filling (15 grams protein and 11 grams fiber per serving), and exceptionally straightforward to prepare, with Instant Pot and stovetop options included.

Introduction

Hamburger soup was not part of my own childhood, but it was one of my husband’s favorites, made often by both his mother and grandmother. My version keeps everything warm, familiar, and wonderfully homey, but replaces the hamburger with TVP and heaps in a generous assortment of vegetables.

The preparation could scarcely be easier. Most of the ingredients go straight into the slow cooker—no browning, sautéing, or separate rehydrating required. Set the cooker and walk away; add the green beans and kale toward the end, then return to a fragrant, deeply satisfying supper.

TVP makes this recipe especially convenient. It is inexpensive, pantry-stable, rich in plant-based protein, and remarkably good at absorbing the savory tomato broth and seasonings around it. Canned tomatoes further streamline the recipe, and several of the fresh vegetables can be replaced with frozen ones when that is what you have.

The finished soup is plain, warming, and substantial without being heavy.. It is also exceptionally versatile: change some of the vegetables, add pasta or cooked grains, or serve each bowl with a generous shower of vegan Parmesan or plant-based cheddar cheese.

Why You’ll Love This Recipe

• Genuine comfort food:It is warming, savory, and filling—a great staple recipe during soup season.
• Remarkably straightforward:Add everything except the green beans and kale to the slow cooker, set the heat, and let the cooker do the work.
• Protein- and fiber-rich:TVP and a generous quantity of vegetables make this a high protein and high fiber soup. Every 1½-cup serving is satisfying and sustaining, with 15 grams protein and 11 grams fiber.
• Pantry-friendly:TVP, canned tomatoes, tomato paste, and dried seasonings form the backbone of the soup.
• Vegan and oil-free:No meat, dairy, or added oil is needed.
• Gluten-free and grain-free:The basic recipe fits both diets when all packaged ingredients are selected accordingly.
• Flexible:Fresh or frozen vegetables both work, and the soup welcomes additional vegetables, pasta, or cooked grains.
• Excellent for meal prep:Prepare the vegetables ahead of time or cook and store the entire soup for later meals.

What Is TVP?

TVP stands fortextured vegetable protein. It is a dry, lightweight ingredient that softens into tender, chewy crumbles as it absorbs liquid. Most traditional TVP is made from soy, butsoy-free varietiesmade from ingredients such as pea protein (Texturized Pea Protein) are now available, too!

Because TVP is dehydrated, it keeps well in the pantry and is an economical way to add plant-based protein to soups, chilis, sauces, and casseroles. There is no need to rehydrate it separately for this recipe: add it dry and let it soak up the seasoned tomato broth as the soup cooks. Brands vary considerably in the size and shape of their crumbles, which is why the weight measurement is the most reliable one here.

If you need the soup to be gluten-free or soy-free, check the TVP package carefully; ingredients and manufacturing practices vary by brand.

No slow cooker? No problem.I have directions in the recipe card to make the soup on the stove, or in an instant pot.

Ingredients

The exact amounts of each ingredient are indicated in the recipe card at the end of the post.Toggle betweenUS Customary(volume) andMetric(weights) for preferred measurement option.

• TVP:The plant-based stand-in for hamburger. It absorbs the broth and seasonings while adding tender, hearty crumbles and plenty of plant-based protein.
• Yellow onion and red bell pepper:The aromatic vegetable base. Frozen chopped peppers and onions are a convenient alternative.
• Garlic powder:Provides mellow garlic flavor throughout the soup without requiring any preliminary chopping or sautéing.
• Sweet potato and gold potatoes:Two kinds of potatoes give the soup a pleasing balance of sweetness, creaminess, and substance. As they soften, they also give the broth more body.
• Carrots and celery:Essential homestyle soup vegetables that add sweetness, color, and savory depth.
• Fire-roasted diced tomatoes:Form the bright, savory base of the broth and contribute a subtle smoky note. Regular diced tomatoes work equally well for a milder tomato flavor.
• Tomato paste:Concentrates the tomato flavor and enriches the broth.
• Water:Hydrates the TVP and becomes a flavorful broth as it cooks with the tomatoes, vegetables, and seasonings. You can replace all or some of the water with vegetable broth, as desired.
• Italian seasoning:An straightforward blend of herbs that gives the soup a fragrant, familiar flavor.
• Sea salt and black pepper:Season and balance the entire pot. Taste before serving and adjust as needed.
• Green beans:Add color, texture, and another generous helping of vegetables. Fresh or frozen cut green beans can be used.
• Kale:A sturdy leafy green that softens during the final part of cooking without disappearing into the soup.
• Fresh parsley (optional):A final sprinkle adds fresh color and flavor.

How to Make Slow Cooker Vegan Hamburger Soup

Note that the complete instructions are also in the recipe card below.

1. Fill the slow cooker.Add the TVP, onion, bell pepper, garlic powder, both kinds of potatoes, carrots, celery, diced tomatoes, tomato paste, water, Italian seasoning, salt, and black pepper to an 8-quart slow cooker. Stir the mixture to combine.
2. Set it and go.Cover and cook on LOW for 8 to 9 hours or on HIGH for 5 to 6 hours.
3. Add the final vegetables.During the final hour, stir in the fresh green beans and kale. Replace the lid and continue cooking until the green beans are tender. If using frozen green beans, add them during the final 30 minutes instead.
4. Adjust and serve.Stir the soup well. Add more water if you prefer a thinner broth, then taste and adjust the salt and pepper. Sprinkle individual servings with parsley, if desired.

Taste and Texture

This is a robust, tomato-rich soup with the familiar flavors of old-fashioned vegetable and hamburger soup. The Italian seasoning and garlic make the broth deeply fragrant, while fire-roasted tomatoes add a subtle smoky background note of flavor.

The TVP becomes tender and pleasantly chewy—not exactly like ground beef, but a satisfying and substantial in its own right. The long cooking time softens the vegetables, and some of the potatoes and vegetables begin to break down, naturally giving the broth more body as some of the liquid evaporates.

Make-Ahead Options

• Prepare the ingredients now and cook later:Chop the onion, bell pepper, potatoes, carrots, and celery and refrigerate them in an airtight container. Prepare the green beans and kale and refrigerate them separately, since they are added later. Measure the dry TVP and seasonings in advance, and leave the canned ingredients sealed until you are ready to cook.
• Cook the entire soup ahead:Prepare the soup from start to finish, cool it completely, and refrigerate or freeze it for straightforward future meals. Like many hearty vegetable soups, it reheats especially well.

Storage and Freezing

Let the soup cool completely before transferring it to airtight containers. Refrigerate for up to 3 days.

To freeze the full batch, transfer the cooled soup to a large airtight freezer-safe container or gallon-size freezer bags. If using bags, lay them flat on a baking sheet until frozen, then remove the baking sheet and store the flat bags in the freezer.

For individual meals, divide the soup into 1½-cup portions in quart-size freezer bags or smaller airtight freezer-safe containers. Leave a little room for expansion. Thaw frozen soup in the fridge, then reheat it gently on the stovetop (low simmer) or in the microwave. Add a splash of water if the broth has thickened during storage.

Flavor Variations

• Add small pasta:Stir a go-to small gluten-free pasta into the slow cooker during the final 30 minutes and cook until tender. Add extra water as needed because the pasta will absorb some of the broth. If using conventional pasta, add during final hour of cooking. Adding conventional pasta means the soup will no longer be gluten-free or grain-free.
• Add cooked grains:Stir cooked quinoa, brown rice, or millet into the finished soup. Add enough to make the soup as hearty as you like, along with a little additional water if needed. The soup will no longer be grain-free.
• Change the vegetables:Use what you have! Use cauliflower in place of the white potatoes, and peas, zucchini, and corn are straightforward additions; stir these veggies in toward the end so they retain their color and texture. Cubed russet potatoes or red potatoes can replace either of the other potatoes and should be added at the beginning.
• Make it cheesier:Sprinkle some gratedplant-based cheddarinto each hot serving or finish the bowls withvegan Parmesan.

Serving Suggestions

Dish up this vegan version of hearty hamburger soup piping hot and serve a thick slice of crusty bread (ideal for dipping) turning each bowl into a complete, deeply comforting meal. I like to sprinkle on some chopped parsley, for fresh color, and sometimes addvegan Parmesan cheeseor nutritional yeast. You can also stir in a tablespoon (or several)gratedvegan Cheddar cheeseto each serving for a vegan cheeseburger soup variation.

Tips for Success

• Use an8-quart slow cookerfor the full recipe. The vegetables begin with considerable volume before softening and settling during cooking.
• For a4-quart slow cooker, halve every ingredient. Follow the same method and begin checking the vegetables at the early end of the cooking-time range.
• Add the TVP dry.It rehydrates in the seasoned soup liquid, so no separate soaking is needed.
• Measure the TVP by weight when possible.The volume varies from approximately 1¼ to 1⅔ cups among brands because the crumbles differ in size.
• Cut uniform pieces.Cut the potatoes, carrots, and celery into reasonably even pieces so they become tender at approximately the same time.
• Add kale and green beens last.Wait until the final hour to add fresh green beans and kale. Add frozen green beans only during the final 30 minutes.
• Adjust liquid as needed.The soup naturally thickens as the vegetables soften and some liquid evaporates. Stir in additional water at the end if you prefer a thinner soup.
• For a gluten-free soup, verify that the TVP and all packaged seasonings and canned products are labeled or certified gluten-free as needed.

Ingredient Substitutions

• TVP:Chopped soy curls can replace the TVP for a larger, chunkier texture. You can also use 2 to 2½ cups frozen vegan beef-style crumbles; consult the package for the reliable addition time because brands vary.
• Lentils or beans:Replace the TVP with one or two drained 14.5-ounce cans of lentils, pinto beans, white beans, chickpeas or black beans. Stir canned lentils or beans in during the final hour so they retain more of their shape. This produces a different texture from TVP (more like minestrone), but an equally hearty soup. You can also add 1 cup dry red lentils or brown lentils at the start of the recipe in place of the dry TVP.
• Onion and bell pepper:Use one 12-ounce bag of frozen peppers and onions. Let them thaw just enough to chop any large pieces before adding them. You can also chopped leeks in place of the onion.
• Sweet potato:Replace it with one 10-ounce bag of frozen cubed butternut squash.
• Fire-roasted tomatoes:Substitute the same quantity of regular diced tomatoes. The soup will be slightly less smoky but still richly tomato-flavored.
• Fresh green beans:Use one 10-ounce bag of frozen cut green beans and add them during the final 30 minutes.
• Kale:Substitute another sturdy leafy green, such as Swiss chard. If using spinach, stir it in during the final 10 minutes because it cooks much more quickly.
• Italian herb seasoning:Use a combination of dried herbs, such as dried basil, thyme, rosemary and oregano. You can also take this plain soup in other flavor directions by swapping in mild chili powder or curry powder.
• Water:Replace with vegan beef broth or bouillon, or other vegetable-based broth.

Frequently Asked Questions

No. Add the TVP directly to the slow cooker while it is still dry. It will absorb the seasoned tomato broth and soften as the soup cooks. This makes it a reliable addition to vegan soup recipes and other vegetarian soups.

Use an 8-quart slow cooker for the full recipe. Halve every ingredient if you are using a standard 4-quart slow cooker.

Yes, but make a half batch so the ingredients remain safely below the pressure cooker’s maximum-fill line. Pressure-cook all the half-batch ingredients except the kale on HIGH for 12 minutes. Allow 5 to 7 minutes of natural pressure release, release the remaining pressure, then use the Sauté function to cook the kale until tender, 3 to 5 minutes.

Yes. Replace the fire-roasted diced tomatoes with an equal quantity of regular diced tomatoes. The flavor will be a little less smoky, but the soup will still be satisfying.

No. Traditional TVP is generally soy-based, but soy-free textured vegetable proteins made from ingredients such as peas are now available. Read the package ingredients and preparation directions because products vary.

Yes, the basic recipe is vegan, gluten-free, and grain-free when you choose suitable packaged ingredients. Check the labels on the TVP, seasonings, and canned products if cross-contact is a concern. Adding pasta or cooked grains can change those classifications.

Yes. Cool the soup completely and freeze it in an airtight freezer-safe container or freezer bag. You can also divide it into 1½-cup portions for individual meals. Lay filled bags flat on a baking sheet to freeze, then remove the sheet and store the flat bags in the freezer.

Enjoy! Don’t forget to leave a rating and review if you give the recipe a try, and tag me on Pinterest, instagram or Facebook.

More Straightforward Vegan Soups

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• 3 Ingredient Lentil Soup
• Creamy Vegan Sweet Potato Soup
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• 3 Ingredient Tomato Lentil Soup