This is my go-to weeknight soup when I want something comforting, inexpensive, and reliably delicious. It cooks fast in the Instant Pot but still gives you that slow-simmered, cozy texture you expect from a classic split pea soup. No fiddly steps. A few veggies, dried peas, and broth do the heavy lifting.

I like that it’s forgiving. You can tweak the texture with a quick blend at the end or leave it chunky; either way it delivers a deep, earthy flavor. The recipe is straightforward and built around pantry-stable ingredients, which makes it perfect for busy days or when you need a simple meal that stretches.

Read on for a clear ingredient breakdown, exact Instant Pot steps, smart swaps that stick to the original ingredient list, and realistic troubleshooting so you won’t stand over the cooker guessing. You’ll have a pot of soup ready to serve before you know it.

Ingredient Rundown

1 tablespoon olive oil — used for sautéing the base vegetables; helps soften them and build flavor.
1 medium onion, diced — provides sweetness and savory depth; dice evenly so it softens at the same rate as the carrots and celery.
2 carrots, peeled and diced — add natural sweetness and texture; peel for a cleaner mouthfeel.
2 celery stalks, diced — brightens the base with a vegetal note and balances the sweetness of the carrots.
2 cloves garlic, minced — gives aromatic lift; add after the vegetables have softened so it doesn’t burn.
1 pound dried green split peas, rinsed — the core ingredient; rinsing removes dust and any small debris and helps even cooking.
6 cups vegetable broth — the cooking liquid and main flavor carrier; use a good quality broth for the best result.
1 teaspoon dried thyme — a subtle herb that complements the earthiness of the peas without overpowering.
Salt and pepper to taste — added at the end so you can properly judge seasoning after cooking and blending.

The Method for Instant Pot Split Pea Soup

Turn the Instant Pot to the Sauté function and add 1 tablespoon olive oil. When the oil is hot, add the diced onion, peeled and diced carrots, and diced celery. Cook, stirring occasionally, until the vegetables are softened, about 5 minutes. If pieces begin to brown or stick, scrape the bottom with the spoon to loosen them.
Add the minced garlic and sauté, stirring, for about 1 minute until fragrant.
Add the rinsed 1 pound dried green split peas, 6 cups vegetable broth, and 1 teaspoon dried thyme. Stir to combine and scrape up any browned bits from the bottom.
Secure the lid and set the steam release valve to Sealing. Select Pressure Cook (or Manual) on High and set the time to 15 minutes.
When the cook cycle ends, allow the pressure to release naturally for 10 minutes. After 10 minutes, carefully move the valve to Venting to release any remaining pressure, then wait until the float valve drops and the lid can be opened.
Open the lid away from you, stir the soup, and season with salt and pepper to taste. If you prefer a smoother texture, use an immersion blender to purée the soup to your desired consistency.

Why This Recipe Belongs in Your Rotation

It’s fast without feeling rushed. The Instant Pot does the heavy lifting, converting dried legumes into a hearty, spoonable meal in under an hour including prep. That means you get the economical benefits of dried split peas—cheap calories and lots of fiber—without the long stovetop simmer.

The ingredient list is minimal and pantry-friendly. You don’t need specialty items to make a deeply flavored soup: aromatics, dried peas, broth, and a touch of thyme. That simplicity makes it dependable for weeknight dinners, lunches for the week, or a bowl to bring to someone who needs a meal.

Finally, it’s flexible. Texture is in your control: chunky and rustic or smooth and velvety, made simply by how much you blend at the end. You can make a large pot and portion it out; the flavors only get better after a day or two in the fridge.

Substitutions by Category

Keeping strictly to the ingredients listed, here are safe adjustments and swaps that respect the original components while giving you slight variations in texture and flavor.

Liquid and Texture

Vegetable broth — if you want a thinner soup, increase the broth slightly after cooking; add it a little at a time until you reach the consistency you want.
Blending — for a chunkier bowl, stir and taste without blending. For a silky finish, blend with an immersion blender until smooth, then adjust salt and pepper.

Fat and Sautéing

Olive oil — stick to the listed amount for clean flavor; if you prefer a richer mouthfeel, you can finish the bowl with a light drizzle of the olive oil before serving.

Herbs and Aromatics

Dried thyme — the recipe uses a small amount for balance; you can increase to suit your taste but keep it measured so it doesn’t dominate the peas.

Appliances & Accessories

For this recipe the Instant Pot is central. Use the sauté function to build the flavor base, then switch to pressure cook so the peas come together quickly.

Helpful accessories:

Immersion blender — optional, for puréeing directly in the pot and saving time and cleanup compared to transferring hot soup to a blender.
Wooden spoon with a flat edge — good for scraping browned bits from the bottom during sautéing so nothing sticks and triggers burn warnings.
Measuring cups and spoons — accurate liquid and herb measurements keep the balance consistent.

Mistakes Even Pros Make

Assuming all legumes cook the same. Split peas cook faster than many whole beans; follow the 15-minute pressure time in the method. Overcooking on a stovetop or doubling the pressure time will turn the peas to an almost gluey consistency.

Skipping the sauté step. That short 5-minute sauté softens the aromatics and develops a base flavor you’ll taste in every spoonful. Skipping it leads to a flatter soup even though the peas are cooked.

Not scraping the bottom early. If vegetables brown and stick during sauté, scrape the bottom before pressure cooking. Burnt bits can trip the Instant Pot’s burn sensor or add an unpleasant bitter note.

Seasoning too early. Add salt only after cooking and blending. Split peas absorb salt during cooking; seasoning at the end ensures you won’t over-salt before you know the finished concentration.

Fit It to Your Goals

Healthy or hearty: this soup already hits high marks for fiber and plant-based protein thanks to the split peas. To keep it light, control added fats and use the listed olive oil or a small drizzle at the end. To make it more substantial within the given ingredient list, serve with a hearty slice of bread or a side salad.

Make-ahead and meal prep: cook a full pot and portion into containers for lunches. The flavor develops overnight; reheat gently and add a splash of vegetable broth if needed to loosen the texture.

Texture preference: decide up front if you want chunky or smooth. Use the immersion blender sparingly to preserve some texture, or go full purée for a velvety bowl. Both are equally valid and depend only on how much blending you do.

What Could Go Wrong

Burn message on the Instant Pot: this usually happens when the bottom browned bits aren’t scraped up or if too little liquid is present. Scrape during the sauté step and make sure you add the full 6 cups of vegetable broth before sealing the lid.

Soup too thick after cooling: split peas continue to thicken as they cool. If your soup feels too thick once refrigerated, stir in a bit of vegetable broth while reheating until the desired consistency returns.

Undercooked peas: if the peas still seem grainy after the natural release, you can reseal and pressure cook for 3–5 more minutes, or simmer with the lid off until fully tender. Always check seasoning after any additional cooking.

Storage Pro Tips

Fridge: cool the soup promptly and store in airtight containers for up to 4 days. Because split peas thicken slightly when chilled, reheat gently on the stove or in the microwave and thin with a splash of vegetable broth or water if needed.

Freezer: portion into freezer-safe containers leaving headspace and freeze for up to 3 months. Thaw overnight in the fridge before reheating. Note that texture may change slightly after freezing; a short blitz with an immersion blender restores creaminess.

Reheating: low and slow is best. Reheat on the stove over medium-low with occasional stirring, or use the microwave in short intervals, stirring between cycles. Add a teaspoon or two of broth if the soup thickens while reheating.

Reader Q&A

How much salt should I add?

Salt to taste after the soup has finished cooking and after blending if you puréed. The exact amount depends on your broth’s sodium level. Start with a small pinch, taste, and add in small increments until the flavor is balanced.

Can I skip the thyme?

Yes. The thyme is subtle; if you don’t have it, the soup will still be flavorful thanks to the onions, carrots, celery, and peas. If you skip the thyme, consider a slightly higher salt or finishing drizzle of olive oil for a touch more depth.

Do I need to rinse the split peas?

Yes. Rinse the dried green split peas under cold water to remove dust and any small debris. It’s a quick step that helps ensure even cooking and a cleaner-tasting broth.

Should I use the sauté function every time?

Yes. The five-minute sauté softens the vegetables and builds flavor. It’s a small step that makes a noticeable difference in the final soup.

Final Bite

This Instant Pot Split Pea Soup is simple, dependable, and designed to fit into a busy routine without compromising on flavor. It gives you comforting bowls, easy leftovers, and straightforward technique. Follow the method, keep the ingredient list tight, and you’ll have a staple in your rotation that’s easy to scale and customize. Make a pot, taste as you go, and let the Instant Pot do the heavy lifting—this is the kind of recipe that proves uncomplicated cooking can be wonderfully satisfying.

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