Gluten-Free Potato Soup

The onion and celery turn soft and sweet in the butter before the potatoes even hit the pot. That first stretch is worth taking slowly; if the vegetables still feel firm, the soup’s base will taste sharper than it should. I keep the heat at medium and stir now and then until they’ve softened, then add the garlic right at the end so it stays fragrant instead of turning bitter.

For this gluten-free potato soup, russets bring plenty of body, while a gluten-free all-purpose flour blend helps the broth feel substantial without needing a long reduction. I whisk the broth in gradually so the flour paste loosens smoothly, then let the potatoes simmer until a fork slides in easily. Mashing some of them against the pot makes the soup thick and comforting but leaves tender pieces in every spoonful. The finished bowl is creamy from whole milk, with a soft potato texture and just enough onion, celery, and garlic underneath.

Why the 1/2-Inch Potato Cut Matters More Than You Think

Potatoes aren’t just the main ingredient here; they also help set the soup’s texture. Cutting the russets into even 1/2-inch pieces gives them a similar path to tenderness, so you’re less likely to have a pot with soft edges and stubborn, firm centers. That consistency matters when the potatoes are doing double duty: some stay as bite-size pieces, and some get mashed into the broth.

Uneven chunks make the finishing step harder to judge. If the smaller pieces are already breaking down while larger ones still resist a fork, mashing won’t give you the same balance of creamy broth and distinct potato pieces. Take a moment to keep the pieces close in size as you cut. You don’t need ruler-perfect cubes, just a steady hand and pieces that look alike. It’s a small bit of prep that pays off in an even, cozy bowl.

What Gives This Gluten-Free Soup Its Creamy Body

• Russet potatoes — Their fluffy texture works especially well in a soup that gets thickened partly by mashing. Choose firm potatoes without soft spots; peeling them gives the finished soup a more even texture.
• Gluten-free all-purpose flour blend — This gives the broth a little structure and helps it cling to the vegetables and potatoes. Use an all-purpose blend rather than a single gluten-free flour, which may behave differently in the butter paste.
• Gluten-free chicken broth — The broth carries the savory flavor through the pot, so choose one you enjoy drinking on its own. Check that the package identifies it as gluten-free rather than assuming every broth is suitable.
• Whole milk — It rounds out the broth with a creamy finish. Whole milk gives the soup more body than a lower-fat option, and it should go in after the potatoes have softened.
• Yellow onion, celery, and garlic — Together they make a savory base without overpowering the potatoes. Finely chopping the onion and celery helps them soften evenly; fresh garlic is easiest to stir in at the end of their cooking time.
• Butter — It softens the vegetables and gives the flour something to combine with before the broth is added. Use butter you like the taste of, since it’s part of the soup’s base rather than a background cooking fat.

Building the Soup in Four Steady Stages

Soften the Onion and Celery Before Adding Garlic

Melt the butter in a 5-quart Dutch oven over medium heat. Add the finely chopped onion and celery, then cook for 5–7 minutes, stirring occasionally, until they’re softened. The vegetables should look tender, not browned or crisp at the edges. Stir in the minced garlic and cook for 30 seconds, just until fragrant.

Cook the Flour Into a Smooth Paste

Sprinkle the gluten-free flour blend over the butter and vegetables. Stir for 1 minute, scraping around the bottom of the pot so the flour is evenly mixed in. It should look like a smooth, thick paste rather than dry flour scattered over the vegetables. Give it the full minute before adding liquid.

Whisk in the Broth, Then Simmer the Potatoes

Pour in the gluten-free chicken broth gradually, whisking as you go until the mixture is smooth. Add the potatoes, kosher salt, and black pepper, then bring the soup to a boil over medium-high heat. Reduce the heat to low, cover, and simmer for 15–20 minutes. The potatoes are ready when a fork pierces them easily.

Mash Some Potatoes and Finish With Milk

Press some of the cooked potatoes against the side of the pot to thicken the soup, leaving other pieces intact. Stir in the whole milk, then cook over medium-low heat for 3–5 minutes, stirring occasionally, until hot. Keep an eye on the surface as it warms; the soup should be hot, not bubbling into a boil. The broth will look creamy, with potato pieces still visible.

Three Small Changes for a Different Bowl

Questions That Come Up While Making Gluten-Free Potato Soup

Gluten-Free Potato Soup

Gluten-free potato soup is simmered in a 5-quart Dutch oven until the russet potatoes are fork-tender, then thickened by mashing some of the potatoes. Whole milk makes the soup creamy, while gluten-free flour helps create a smooth base.

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Prep Time 15 minutes mins

Cook Time 30 minutes mins

Total Time 45 minutes mins

Servings: 6 servings

Course: Lunch

Cuisine: American

Calories: 320

Ingredients Equipment Method Notes

Ingredients

  

• 4 tbsp butter
• 1 yellow onion medium, finely chopped
• 2 celery ribs finely chopped
• 2 cloves garlic minced
• 0.25 cup gluten-free all-purpose flour blend
• 4 cups gluten-free chicken broth
• 2.5 lb russet potatoes peeled and cut into 1/2-inch pieces
• 1 tsp kosher salt
• 0.5 tsp black pepper
• 2 cups whole milk

Equipment

• 1 5-quart Dutch oven

Method

 

1. Melt the butter in a 5-quart Dutch oven over medium heat.
2. Add the onion and celery and cook for 5–7 minutes, stirring occasionally, until softened.
3. Stir in the garlic and cook for 30 seconds.
4. Sprinkle in the gluten-free flour and stir for 1 minute, until it forms a smooth paste with the butter and vegetables.
5. Gradually whisk in the chicken broth until smooth.
6. Add the potatoes, salt, and pepper, then bring to a boil over medium-high heat.
7. Reduce the heat to low, cover, and simmer for 15–20 minutes, until the potatoes are tender when pierced with a fork.
8. Mash some of the potatoes against the side of the pot to thicken the soup.
9. Stir in the milk.
10. Cook over medium-low heat for 3–5 minutes, stirring occasionally, until hot; do not let the soup boil.

Notes

For a thicker soup, mash more of the tender potatoes against the pot before adding the milk. Refrigerate leftovers for 3–4 days; freezing is not recommended because the milk may separate. For a dairy-free variation, use dairy-free butter and unsweetened dairy-free milk.