Gluten-Free Au Gratin Potatoes

Indulge in creamy, cheesy, and comforting au gratin potatoes, made entirely gluten-free. Thinly sliced potatoes are baked in a rich, savory sauce until tender and golden brown, creating a truly decadent side dish.

Prep: 15 min Cook: 65 min Total: 90 min Serves: 4

At a glance: This medium salads and sides recipe yields 4 servings in about 1h 30m (15 min prep, 65 min cook). It uses 9 ingredients — including yukon gold potatoes, gluten-free all-purpose flour blend, vegan butter — and walks through 6 steps. Updated October 25, 2026. Browse more salads and sides recipes or return to all gluten-free recipes.

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Cross-Contamination Warning for Gluten-Free Au Gratin Potatoes: When preparing this salads and sides recipe, vegan butter, plant-based milk and vegan shredded cheese all vary by brand, so choose versions labeled gluten-free, plus the flour blend for the roux. Whisk the roux in a saucepan washed after any wheat-flour sauce.

Gluten-Free Notes for Gluten-Free Au Gratin Potatoes: This recipe is gluten-free by using a gluten-free flour blend and ensuring all other ingredients are gluten-free. It avoids any gluten-containing grains.

Scale Recipe:

servings

Ingredient amounts update automatically

Ingredients

Shop links on this page are for gluten-free all-purpose flour blend, unsweetened plant-based milk, nutmeg. Buy the package that says gluten-free. A shared production line is the usual risk with these pantry items. As an Amazon Associate, we earn from qualifying purchases, at no extra cost to you. Confirm the product is labeled gluten-free before you buy.

2.5 lbs Yukon Gold potatoes, thinly sliced (about 1/8-inch thick)
2 tbsp gluten-free all-purpose flour blend Shop
2 tbsp vegan butter
2 cups unsweetened plant-based milk (such as almond or soy) Shop
1 tsp salt
0.5 tsp black pepper
0.25 tsp nutmeg Shop
1 clove garlic, minced
0.5 cup vegan shredded cheese (optional, for topping)

Instructions

1 Preheat your oven to 375°F (190°C) and lightly grease a 9x13 inch baking dish. Prepare the potatoes by washing them thoroughly and slicing them very thinly, about 1/8-inch thick. Aim for consistent thickness so they cook evenly.
2 In a medium saucepan over medium heat, melt the vegan butter. Once melted and shimmering, whisk in the gluten-free all-purpose flour blend, creating a roux. Cook this mixture for about 1-2 minutes, stirring constantly, until it smells slightly nutty and has a pale golden color.
3 Gradually whisk in the plant-based milk, a little at a time, ensuring each addition is fully incorporated before adding more. Continue whisking until the sauce is smooth and begins to thicken, which should take about 5-7 minutes. Bring the sauce to a gentle simmer, then reduce the heat to low.
4 Stir the salt, black pepper, nutmeg, and minced garlic into the thickened sauce. Taste the sauce and adjust seasonings as needed. The sauce should be creamy and well-seasoned, with a hint of warmth from the nutmeg.
5 Arrange the thinly sliced potatoes in an even layer in the prepared baking dish. Pour the creamy sauce evenly over the potatoes, ensuring they are mostly submerged. If using, sprinkle the vegan shredded cheese over the top for an extra layer of flavor and texture.
6 Cover the baking dish tightly with aluminum foil and bake for 30 minutes. Remove the foil and continue baking for another 20-25 minutes, or until the potatoes are tender when pierced with a fork and the top is golden brown and bubbly. Let the au gratin potatoes rest for about 10 minutes before serving.

Nutrition (per serving)

355

Calories

Protein

39g

Carbs

11g

Fat

Fiber

285mg

Sodium

Tips & Notes

Slice the potatoes on a mandoline for even 1/8-inch slices. Uneven slices leave some potatoes firm while others turn soft.
Don't rinse the potato slices after cutting. Their surface starch helps thicken the plant-based sauce as the gratin bakes.
Let the gratin rest 10-15 minutes after baking so the sauce sets and portions hold together. Choose a vegan shredded cheese labeled gluten-free.

Common questions

How long does Gluten-Free Au Gratin Potatoes take?

Gluten-Free Au Gratin Potatoes takes about 1 hour 30 minutes, including resting time: 15 minutes to prep and 65 minutes to cook, for 4 servings.

What should I check before making Gluten-Free Au Gratin Potatoes with celiac disease?

Written with gluten-free ingredients. Use products labeled gluten-free, check labels, and ask your clinician about your own needs.

What cross-contamination risk is specific to Gluten-Free Au Gratin Potatoes?

Check Yukon Gold potatoes, thinly sliced, gluten-free all-purpose flour blend, vegan butter before they go into Gluten-Free Au Gratin Potatoes. Vegan butter, plant-based milk and vegan shredded cheese all vary by brand, so choose versions labeled gluten-free, plus the flour blend for the roux. Whisk the roux in a saucepan washed after any wheat-flour sauce.

Which gluten-free swaps does Gluten-Free Au Gratin Potatoes use?

Gluten-Free Au Gratin Potatoes relies on a gluten-free all-purpose flour blend. Keep those gluten-free-labeled products in place of a gluten-containing flour or sauce. If the blend already lists xanthan gum, do not add a second binder unless this recipe says to.

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Gluten Free Recipes team

Gluten-free recipe development since 2026

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