Jason's Deli Irish Potato Soup Copycat Recipe: Creamy Gruyère and Caramelized Onion Layers

This Jason's Deli Irish Potato Soup copycat recipe delivers the same velvety, Gruyère-rich comfort you crave—without the restaurant price tag. The secret lies in slow-cooked caramelized onions and perfectly blended potatoes that create that signature creamy texture, layer upon layer.

I've recreated this soup exactly as I remember it from my favorite deli visits, right down to the buttery, cheesy finish that makes every spoonful worth it.

The foundation of this copycat recipe is patience—letting onions caramelize for 20 minutes until deep amber builds that sweet, complex base. Gruyère cheese, melted into the broth, adds a nutty depth that separates this from ordinary potato soup.

The potatoes blend until silky smooth while keeping just enough texture to satisfy, all while the broth reduces to a rich, aromatic consistency that coats your spoon.

What you'll end up with is a creamy, restaurant-quality bowl that's warm, inviting, and packed with flavor in every bite. The aroma alone will have your kitchen smelling like a cozy deli, while the first sip delivers that perfect balance of savory, cheesy, and slightly sweet notes.

This isn't just potato soup—it's a copycat masterpiece that'll have you reaching for seconds.

Serve it with crusty bread for soaking up every last drop, or pair it with a simple green salad to balance the richness. The best part?

This recipe makes 8 servings, so you can enjoy deli-style comfort at home for days. Let's get cooking—your taste buds won't know the difference.

Ingredients for jason's deli irish potato soup copycat

Eight simple ingredients transform into that iconic deli-style soup you crave.

The Gruyère is non-negotiable here—it's what gives this soup that signature nutty, rich flavor. Look for a wedge at specialty cheese shops or the deli section of Whole Foods, not the pre-grated stuff from the green can. That stuff tastes like sawdust. For the onions, yellow onions work best—they caramelize beautifully. I always grab the big ones from Trader Joe's because they're cheap and sweet. The potatoes? Russets are your best bet—they break down perfectly when blended. If you can't find Russets, Yukon Golds will work in a pinch, but they'll be slightly creamier.

No Gruyère? Comté or sharp cheddar can substitute, but you'll lose that signature depth. Short on chicken broth? Vegetable broth plus a bouillon cube works, but add a splash of lemon juice to brighten it up. The heavy cream is key for that velvety texture—half-and-half in a bind, but it'll be lighter. Fresh thyme is ideal, but dried at one-third the amount gets you close. For the veggies, frozen diced carrots and celery work if you're in a rush, but fresh gives better flavor. The butter? Don't skip the unsalted kind—you're controlling the salt here.

This soup tastes even better the next day—make extra portions and freeze for up to 3 months. Store leftovers in the fridge for 5 days, but add a splash of milk or cream when reheating to restore creaminess. I always make this on Sunday so I can enjoy it all week. The aroma alone will have your whole house smelling like a cozy deli. Serve with crusty bread to soak up every last drop of that creamy goodness.

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

Here's how to recreate that signature creamy, cheesy soup with rich caramelized onion layers.

Heat the 0.5 cup butter in a large Dutch oven over medium-low heat. Add the 4 whole yellow onions, sliced thinly, and cook them undisturbed for 10 minutes. You'll see them release moisture first, then it will slowly evaporate as they soften and begin to turn golden.

Here's where patience pays off: stir occasionally over the next 30-40 minutes until the onions are deep golden brown with caramelized edges. They should smell incredibly sweet and rich—this is the flavor foundation of the soup. If they start to stick, add a splash of chicken broth to deglaze, but don't rush the process. Perfect caramelization takes time.

While the onions caramelize, dice the 2 whole celery stalks, 2 whole carrots, and 3 lb russet potatoes into even ½-inch cubes. When the onions are fully caramelized, add them back to the pot along with the diced vegetables, 4 cloves minced garlic, 2 tsp salt, 1 tsp black pepper, 1 tsp dried thyme, and 2 whole bay leaves.

Pour in the 6 cups chicken broth and bring everything to a gentle boil. Once boiling, reduce heat to medium-low and let it simmer uncovered for 20-25 minutes until the potatoes are fork-tender. You'll know they're ready when a knife slides in easily—this is crucial for that creamy texture. Stir occasionally to prevent sticking, but don't overmix.

Remove the bay leaves and stir in the 1 cup heavy cream and 1.5 cups freshly grated gruyère cheese. The cheese should melt completely into the soup, creating that signature velvety texture. If the soup looks too thick, add ¼ cup water or more chicken broth to reach your desired consistency—it should coat the back of a spoon but still be smooth.

Let the soup simmer gently for another 5-7 minutes to allow the flavors to meld together. Taste and adjust seasoning with more salt or black pepper if needed. The cheese should add a nutty depth that complements the sweet caramelized onions perfectly. This is where the magic happens—don't skip the simmering time.

Ladle the soup into bowls and garnish each serving with an additional sprinkle of gruyère cheese for that restaurant-style presentation. Serve immediately while hot, as the flavors continue to develop even after cooking. The soup should be thick, creamy, and packed with layers of flavor from the caramelized onions, tender potatoes, and rich cheese.

For the best experience, pair with crusty bread to soak up every last drop of that creamy goodness. The soup will keep well in the refrigerator for up to 4 days, but it's best enjoyed fresh while the cheese is still melted and the onions are perfectly caramelized. This copycat version delivers all the comfort and richness of the original!

Flavor customization for this dish

Spicy Kick Option

For those who love heat, add ½ teaspoon smoked paprika and ¼ teaspoon cayenne pepper when sautéing the onions. This introduces a subtle smokiness and a gentle burn that complements the creamy texture.

If you want more heat, stir in 1 tablespoon hot sauce (like Frank's RedHot) at the end—just before serving. This keeps the spice balanced without overpowering the rich flavors. 🌶️

Herb Variations

Swap out the thyme for 1 teaspoon dried rosemary or 1 tablespoon fresh parsley for a brighter, more aromatic profile. I find that rosemary adds a piney depth that pairs beautifully with the Gruyère, while parsley brightens the dish with a fresh finish.

For a more complex flavor, add ½ teaspoon dried tarragon—it has a slight anise-like note that works surprisingly well in this creamy soup.

Vegetarian Twist

Replace the chicken broth with 6 cups vegetable broth and add ½ cup nutritional yeast when blending the potatoes for a cheesy, umami-rich flavor. For extra protein, stir in 1 cup cooked white beans (like cannellini or navy beans) when simmering the soup.

The beans blend seamlessly into the creamy texture while adding heartiness. This version is just as satisfying and perfect for meat-free meals.

Extra Creamy Boost

For an even richer texture, replace the heavy cream with 1 cup full-fat coconut milk—it adds a subtle sweetness that enhances the caramelized onions. Alternatively, stir in ½ cup sour cream at the end for a tangy contrast.

I also love adding 2 ounces cream cheese when blending the potatoes—it melts into a silky consistency that elevates the soup to restaurant-quality decadence. 💛

Crunchy Toppings

Add texture with ¼ cup crispy fried onions or toasted breadcrumbs on top. For a gourmet touch, sprinkle with crumbled bacon or crispy prosciutto just before serving. These toppings add a satisfying contrast to the velvety soup and make it feel even more indulgent.

I especially love the combination of crispy bacon and extra Gruyère—it’s a match made in comfort food heaven.

Lighter Version

Cut calories by using ½ cup low-fat Greek yogurt instead of heavy cream and reducing the Gruyère to 1 cup. Thin the soup with an extra ½ cup broth to maintain creaminess without the richness.

For extra flavor, add 1 teaspoon lemon zest when blending the potatoes—it brightens the dish and balances the creaminess. This version keeps all the soul of the original while being lighter and more refreshing.

Frequently asked questions