Jason's Deli Irish Potato Soup Copycat Recipe: Creamy, Rustic Bites With Mustard-Vinegar Tang

This Jason's Deli Irish Potato Soup copycat recipe delivers the same velvety creaminess and bold tang that made the original famous—right down to the rustic potato chunks and mustard-kissed broth.

After years of perfecting the balance between rich dairy and sharp vinegar, I’ve cracked the code for restaurant-quality texture at home, where the potatoes stay tender yet substantial and the soup thickens just enough to coat a spoon.

The secret lies in a slow simmer that develops deep flavor without breaking the potatoes, followed by a precise blend that creates that signature silky finish.

What sets this recipe apart is the careful layering of flavors—creamy cheese, tangy mustard, and a touch of vinegar—that come together in every spoonful.

Unlike many copycat recipes that rely on instant potatoes or heavy cream, this version uses real Yukon Gold potatoes simmered until fork-tender, then blended with a small amount of cream for that signature creamy yet not overly rich consistency. The result?

A soup that’s hearty enough for a cold day but light enough to enjoy without feeling weighed down.

By the time you’re stirring in the final garnish of fresh chives and a drizzle of sour cream, you’ll have a bowl of soup that tastes like it came straight from Jason’s Deli—warm, comforting, and packed with rustic charm.

The copycat technique ensures every detail is replicated, from the thickness of the broth to the perfect balance of tangy and creamy. Whether you’re serving it at a family gathering or enjoying a cozy night in, this recipe delivers the same satisfaction as the original.

Ready to make it? The process is straightforward: sauté onions, simmer potatoes in broth, blend to perfection, and finish with the signature tang. No shortcuts, just restaurant-quality results that’ll have everyone asking for seconds. Let’s get started—your taste buds will thank you.

Ingredients for jason's deli irish potato soup copycat

Sixteen ingredients, zero shortcuts. Everything you need for that iconic Jason's Deli Irish Potato Soup.

The Yukon Gold potatoes are non-negotiable here—they hold their shape better than Russets and have that signature creamy texture. Buy them fresh from the grocery store's produce section, not the pre-washed bins. For the broth, homemade is ideal, but Pacific Foods or Swanson low-sodium versions work in a pinch. The onions, celery, and carrots should be fresh and crisp—no rubbery stalks. If you're short on time, Trader Joe's sells pre-diced mirepoix that saves chopping. The sharp cheddar needs to be freshly shredded; pre-shredded gets clumpy and lacks flavor. Kraft Natural or Cabot are solid choices.

No Yukon Golds? Russet potatoes work, but they'll break down more during blending. Out of heavy cream? Half-and-half plus a splash of milk mimics the richness. The mustard is key—Maille Dijon is my go-to, but any quality Dijon will do. No apple cider vinegar? White vinegar or lemon juice at half the amount gets you close. The chives can be swapped for parsley if needed, but they add that fresh, bright finish. For the butter, Plugrá or Land O'Lakes unsalted melt beautifully for sautéing. And if you're making this ahead, store the broth and potatoes separately—they reheat better that way.

This soup tastes even better the next day, so make a big batch. The broth and veggies keep 4-5 days in the fridge, and the blended portion freezes for 3 months. I like to portion the finished soup into containers with a dollop of sour cream on top—freeze those containers directly so you can grab and reheat. The chives and sour cream should always be added fresh after reheating, though. Trust me on that.

Step-by-step instructions for jason's deli irish potato soup copycat

Here's the exact method to recreate that signature restaurant-style soup at home.

In a large Dutch oven, melt the 2 tablespoons unsalted butter over medium heat. Add the 1 whole yellow onion, 3 whole celery stalks, and 2 whole carrots—all prepped as directed. Cook for 8-10 minutes, stirring occasionally, until the vegetables soften and the onion becomes translucent.

This slow cook ensures the vegetables release their natural sweetness and flavors into the butter. You'll know it's ready when the carrots are tender and the mixture smells aromatic. If the butter starts to brown too quickly, reduce the heat slightly to prevent burning.

Stir in the 2 tablespoons Dijon mustard and 1 tablespoon apple cider vinegar, mixing well to coat the vegetables. Cook for another 2 minutes until the raw mustard smell disappears and the mixture becomes fragrant.

This step is where the signature tang develops. The mustard adds depth while the vinegar brightens the flavors. Don't skip this—it's what makes this soup taste like the deli version. If you're sensitive to strong flavors, you can reduce the vinegar to ½ tablespoon but don't eliminate it completely.

Add the 3 pounds Yukon Gold potatoes (cut into 1-inch chunks) and pour in the 6 cups chicken broth. Bring everything to a boil, then reduce heat to medium-low and let it simmer uncovered for 20-25 minutes until the potatoes are fork-tender.

You'll know the potatoes are ready when they pierce easily with a fork but still hold their shape slightly. The soup should be thick but not pasty—this is the perfect consistency before adding the dairy. If it looks too thin, let it simmer a few more minutes to reduce slightly.

Remove the pot from heat and stir in the 1 cup heavy cream and 1 cup whole milk. Add the 1.5 cups shredded sharp cheddar cheese and the 1.5 teaspoons salt and 0.5 teaspoon black pepper. Let the mixture sit off the heat for 5 minutes to allow the cheese to melt completely and the soup to thicken.

This is where the magic happens—the dairy creates that signature creamy texture. If the soup looks too thick after stirring, you can add a splash of the reserved broth to reach your preferred consistency. The cheese should be fully melted with no grainy bits remaining.

Return the soup to low heat (just to maintain warmth) and stir in the 0.5 cup sour cream until fully incorporated. Taste and adjust seasoning if needed. Ladle into bowls and garnish with 0.25 cup chopped fresh chives. Serve immediately with crusty bread for dipping.

This soup tastes best fresh when the cream is still warm and the chives add that final bright note. The mustard-vinegar tang should be noticeable but balanced by the rich, creamy cheese sauce. Each spoonful should deliver that perfect combination of rustic vegetables and velvety texture that makes this soup so special.

Dietary considerations for this jason's deli irish potato soup copycat

Dairy-Free Adaptation

For a dairy-free version, swap the heavy cream and whole milk with 1 cup full-fat coconut milk (the canned kind, not carton) for richness.

Use 1 cup unsweetened almond milk for blending, and replace the sharp cheddar with 1.5 cups nutritional yeast (for cheesy flavor) plus ½ cup vegan mozzarella shreds. The coconut milk adds a subtle sweetness that balances the tangy mustard and vinegar beautifully. 🥥

Gluten-Free Options

This recipe is naturally gluten-free, but always double-check your chicken broth label—some brands use barley malt or wheat-based thickeners. I recommend Pacific Foods gluten-free chicken broth or homemade broth made with gluten-free ingredients.

The Dijon mustard and apple cider vinegar are also gluten-free, so no substitutions are needed here. The original recipe is safe for gluten-free diets as written.

Lower-Carb Version

To reduce carbs, replace the 3 pounds Yukon Gold potatoes with 3 cups cauliflower florets (about half a head) and 1 cup diced zucchini. Simmer these veggies with the broth for 15 minutes instead of 20-25, as they cook faster.

The cauliflower adds a slight earthiness that complements the creamy broth. For extra heartiness, stir in ½ cup cooked lentils at the end. 🥬

Lactose-Free Adjustments

If you're lactose intolerant but can tolerate small amounts, use lactose-free heavy cream and lactose-free milk (like Fairlife or Organic Valley brands). For the cheese, opt for lactose-free sharp cheddar (such as Kraft Lactose-Free) or a lactose-free blend.

The sour cream can be replaced with lactose-free sour cream (like Breakstone's), though it won’t be as rich. The tangy mustard and vinegar remain unchanged.

Vegetarian Substitutes

For a vegetarian version, replace the chicken broth with vegetable broth (I like Imagine or Pacific Foods brands) and add 1 cup cooked white beans (like cannellini) to the pot with the potatoes.

The beans add protein and creaminess without needing dairy. For extra depth, stir in 1 teaspoon miso paste when building the flavor foundation—it enhances the umami and balances the tang. 🌱

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