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Instant Pot Lentil Soup

Instant Pot Lentil Soup

Instant Pot Lentil Soup is a creamy, earthy, and deeply flavored bowl that delivers tender French green lentils and smoky tomato notes in an easy weeknight dinner. With rich aromatics, bright tomatoes, and a hint of smoked paprika, it serves as a comforting, pantry friendly meal that reheats beautifully. Make a double batch to enjoy leftovers throughout the week.
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Prep Time 5 minutes
Cook Time 45 minutes
Total Time 50 minutes
Course Soups
Cuisine American
Servings 6 servings
Calories 280 kcal

Equipment

  • Instant Pot
  • Wooden Spoon

Ingredients
  

  • 2 tablespoons extra-virgin olive oil Enhance flavor and prevent sticking by heating until shimmering; provides a silky mouthfeel and carries aromatics throughout the soup. Use as the base for sautéing vegetables and blooming spices for deeper overall taste.
  • 1 medium yellow onion small diced Provide a sweet, aromatic foundation when finely diced and sautéed; soften to translucent to release natural sugars that balance acidity. Add early in cooking to build savory depth and aromatic complexity.
  • 4 medium carrots Contribute natural sweetness and body when chopped and softened; add texture and brighten the broth with their earthy flavor. Cook until tender to integrate their sugars into the soup base for a comforting finish.
  • 3 stalks celery Add a mild, savory crunch and aromatic backbone when sliced; release an herbal, slightly bitter note that complements the lentils. Sauté with onions and carrots to form a classic mirepoix that deepens overall flavor.
  • 4 springs fresh thyme Impart subtle, lemony, and floral notes when stems or leaves are added; infuse the broth with gentle herbal complexity. Tie sprigs together or add loose to simmer, removing before serving for balanced aroma.
  • 1 teaspoon kosher salt Season and enhance all flavors while controlling overall saltiness; dissolve into the broth for even distribution. Adjust to taste toward the end of cooking to avoid over-salting once reduction occurs.
  • 3/4 teaspoons smoked paprika Introduce a smoky, slightly sweet background note that elevates roasted and earthy flavors; sprinkle during sautéing or simmering for integrated taste. Use sparingly to avoid overpowering delicate lentil nuances.
  • 1/2 teaspoon ground black pepper Add a sharp, warming bite and mild heat that complements the smokiness and herbs; grind fresh for best aroma. Incorporate during cooking and finish with a pinch if additional pepper heat is desired.
  • 1 1/2 cups French green lentils Provide hearty body and a creamy texture after cooking; absorb flavors from the broth and aromatics to become tender but intact. Rinse and inspect before use, then simmer until al dente for best mouthfeel.
  • 4 cloves garlic minced (about 4 teaspoons) Deliver bright, pungent flavor and aromatic lift when minced; mellow and sweeten upon cooking to enrich the soup. Stir in during sautéing to bloom its oils or toward the end for a fresher garlic presence.
  • 1 can fire-roasted diced tomatoes (15 ounces) Contribute charred, tangy tomato pieces that add texture and a hint of caramelized flavor; complement the lentils with roasted umami. Add with crushed tomatoes to provide layered tomato character and visual interest.
  • 1 can crushed tomatoes (15 ounces) Provide a smooth, concentrated tomato base that thickens and deepens the broth; add rich umami and natural acidity for balance. Combine with diced tomatoes to create a cohesive tomato presence throughout the soup.
  • 4 cups low-sodium vegetable broth Supply the cooking liquid and subtle savory notes while controlling sodium; acts as the medium for lentil hydration and flavor melding. Choose low-sodium to better manage seasoning and allow other ingredients to shine.
  • Chopped fresh parsley for serving Offer a fresh, bright finish and herbaceous contrast when sprinkled over bowls; adds color and a light vegetal note. Chop finely and add just before serving to preserve freshness and aroma.
  • Freshly grated Parmesan cheese optional for serving Add a salty, nutty finishing touch when grated over the soup; enriches umami and creates a creamy contrast with the lentils. Use sparingly as an optional garnish to complement the vegetable-forward flavors.
  • Crusty bread optional for serving Provide a crunchy, comforting accompaniment to soak up broth and add texture; rounds out the meal with rustic heft. Serve warm alongside bowls to offer a satisfying contrast to the tender soup.

Instructions
 

  • Drizzle the oil into the Instant Pot. Set to SAUTE. Once the oil is hot, add the onion and stir. Continue to cook the onion, stirring often, until the onions are very soft and beginning to nicely brown and break down, about 8 minutes.: The moment the extra-virgin olive oil hits the hot pot you should hear a soft shiver of heat, and when the oil shimmers faintly it is ready. This step matters because hot oil rapidly extracts flavor from the next aromatics, letting the onion and garlic brown instead of stewing, producing sweet, caramelized notes rather than raw sharpness. If the oil smokes heavily, the heat is too high, which will scorch those aromatics and create a bitter flavor, so lower the heat and wipe the pot if needed. Watch for a glossy surface before adding anything.
  • While the onion cooks, peel the carrots and cut into small dice. Small dice the celery as well. Add the carrots, celery, thyme springs (you can tie them together if you like to make them easier to fish out later), salt, smoked paprika, and pepper. Sauté until the carrots and celery are barely soft, about 2 minutes.: You will smell a soft onion fragrance right away as it begins to sweat; this gentle aroma will deepen to sweet and toasty as sugars caramelize. Stir constantly at first to coat the pieces in oil and to prevent any sticking. This technique ensures the onion breaks down uniformly, giving the soup a silky base. A common mistake is crowding the pot, which causes steaming instead of browning, so give the onion space and patience to color.
  • Add the lentils and garlic to the pot and stir to coat them in the spices. Let cook 30 seconds, until the garlic is fragrant. Add the diced tomatoes, crushed tomatoes, and vegetable broth.: As the onion softens you will notice glossy edges and a faint golden tint emerging, and that sweet, nutty aroma signals proper caramelization. This adds complexity that a quick cook cannot replicate. Resist upping the heat to rush this, because fast browning leads to bitterness; instead allow time for gentle color change and stir every so often to ensure even cooking.
  • Cover and seal the Instant Pot, and then set to cook on HIGH pressure for 15 minutes. After 15 minutes of high pressure, allow the cooker to release pressure naturally. This will take about 10 to 15 additional minutes.: You should feel the firm texture of the carrots as you dice, and the small size helps them release sweetness quickly during sauteing. Uniform dice ensures consistent cooking, so take a moment to match the pieces. A frequent oversight is making pieces unequal, which leads to some biting down on undercooked carrots and others that are mushy, so care in cutting matters.
  • Open the lid and stir the soup. Remove the thyme stems, leaving the leaves in the soup. If the soup is too thick for your liking, thin with a bit of water or additional stock until you reach your desired consistency. (We tend to like our soups pretty thick and hearty around here.) Taste and adjust the seasonings as desired. Serve hot with a sprinkle of parsley, Parmesan (if using), and bread for dipping.: The aroma of cut celery will lift the whole countertop with a green, slightly peppery scent, and small pieces will soften quickly to become subtle background texture. This balancing bitterness is crucial to offset the tomatoes and lentils. If you add large chunks, they will remain too crisp and disrupt the mouthfeel, so keep them small.
  • Add the carrots, celery, thyme springs (you can tie them together if you like to make them easier to fish out later), salt, smoked paprika, and pepper.: When you add these, the pot will emit an herbaceous burst and a warm paprika perfume; stirring releases their flavors into the oil and onion, creating a unified base. The tied thyme is a convenience for removal, leaving fragrant leaves behind. Over seasoning at this stage can’t be fully corrected later, so start modestly with the salt and adjust at the end.
  • Sauté until the carrots and celery are barely soft, about 2 minutes.: After a couple of minutes you will see the vegetables lose a bit of crunch and take on a translucent sheen. This quick saute softens the edges and lets aromatics mingle, which is why we do it before adding liquids. Watch for browning on the edges; while some color is good, too much will lean bitter, so reduce heat if you notice dark spots forming.
  • Add the lentils and garlic to the pot and stir to coat them in the spices.: The dry French green lentils will clack softly as they hit the pot, and the minced garlic will immediately release a bright, peppery scent when stirred into the warm mixture. Coating them helps the lentils begin absorbing flavors, which builds a more integrated taste. A common error is adding cold water right away after garlic which can mute its flavor, so mixing first ensures the garlic blooms.
  • Let cook 30 seconds, until the garlic is fragrant.: In this brief interval the garlic should go from sharp to toasted aromatic, giving a nutty, mellow edge. This matters because burnt garlic becomes acrid, so stay attentive; the window is short. If the garlic starts to brown, remove the pot from heat momentarily to cool the pan, then continue to the next step.
  • Add the diced tomatoes, crushed tomatoes, and vegetable broth.: As you pour in the liquids you will see a flash of steam and a tomatoey perfume that brightens the bowl. The combination of diced and crushed tomatoes gives both texture and body, while the vegetable broth creates a savory canvas. Adding everything in this order lets the flavors marry before pressure cooking. Avoid adding too much extra liquid initially, because lentils will swell and you can always thin after cooking if needed.
  • Cover and seal the Instant Pot, and then set to cook on HIGH pressure for 15 minutes.: As the lid seals you will hear a quiet shift, and then the cooker will build pressure; this pressurized environment forces liquids into the lentils, intensifying flavor and tenderizing quickly. The 15 minute high pressure is calibrated so the French green lentils remain intact yet tender. A mistake is trying to quick release at this point, which can leave undercooked lentils, so trust the timing.
  • After 15 minutes of high pressure, allow the cooker to release pressure naturally.: You will notice the pressure slowly come down, and this gentle finish continues to soften the legumes while letting flavors settle. Natural release prevents violent boiling and avoids splattering, maintaining a smooth texture. Rushing to force release can create unevenly cooked lentils and a frothy top, so be patient for about 10 to 15 minutes.
  • Open the lid and stir the soup.: When you lift the lid, inhale deeply the convergence of tomato, thyme, and roasted notes; stirring integrates all the components and distributes heat evenly. Removing the thyme stems at this point keeps delicate leaves in the pot without woody bits. If you notice the soup is too thick, the correct move is to thin with warm water or stock, adding a little at a time until desired consistency is reached; avoid cold water which will cool the pot.
  • Remove the thyme stems, leaving the leaves in the soup.: Fish out the stems so the soup remains smooth; the leaves that fell off during cooking provide subtle herb flavor. This small act improves mouthfeel because the woody stems would be unpleasant. Forgetting to remove stems results in tough, fibrous bites, so take a moment to skim them out.
  • If the soup is too thick for your liking, thin with a bit of water or additional stock until you reach your desired consistency.: When you add liquid, do so gradually and stir while monitoring the body. Warm liquid helps preserve temperature and texture, while cold additions will lower the dish temperature and may change the mouthfeel. A common slip is overshooting and making it too thin, but you can always simmer uncovered to reduce some liquid.
  • Taste and adjust the seasonings as desired.: This is where your palate finishes the job. Sample for salt, pepper, and acid, and add small increments to correct the balance. Warming the soup again after adjustments lets flavors realign. A misstep is adding too much salt early; correct by adding a squeeze of acid or more broth, but start conservatively.
  • Serve hot with a sprinkle of parsley, Parmesan (if using), and bread for dipping.: The final presentation should include a fresh shower of chopped parsley for brightness, and a little Parmesan cheese if you want extra umami. The aroma of warm herbs and cheese is inviting, and the contrast of crusty bread makes each bite tactile. Avoid adding cheese while the soup is boiling hot to prevent clumping; sprinkle just before serving.

Notes

  • Control salt early and finish later Start with the small amount of kosher salt listed, and always adjust at the end after the flavors have concentrated during pressure cooking.
  • Toast spices briefly Blooming the smoked paprika in hot oil for a few seconds releases its aroma and deepens the smoky notes without needing extra ingredients.
  • Keep lentils consistent Use French green lentils for their firm texture; substituting very small lentils will give you a softer result and change cooking behavior.
  • Tie herbs for easy removal Bundle the thyme so you can remove it cleanly after cooking while keeping the leaf flavor dispersed in the soup.
  • Adjust texture after cooking If the soup thickens beyond your preference, add warm broth gradually until you reach the right consistency rather than diluting with cold water.
Keyword easy lentil soup recipe, french green lentils soup, instant pot lentil soup, weeknight lentil soup