Indulge in a comforting and delicious dish with these au gratin potatoes. This recipe combines thinly sliced potatoes with a creamy, savory sauce that bakes to golden perfection. Perfect as a side dish for any meal, these au gratin potatoes are sure to be a hit at your dinner table.
If you don't typically stock nutritional yeast or unsweetened almond milk in your pantry, you might need to make a trip to the supermarket. Nutritional yeast is often found in the health food section, while unsweetened almond milk is usually located in the dairy or plant-based milk aisle.

Ingredients For Au Gratin Potatoes Recipe
Potatoes: The main ingredient, providing the base for the dish.
Unsweetened almond milk: A dairy-free alternative to traditional milk, adding creaminess to the sauce.
Nutritional yeast: Adds a cheesy, umami flavor to the sauce without using dairy.
Olive oil: Used to sauté the garlic and add richness to the sauce.
Garlic: Provides a fragrant and flavorful base for the sauce.
Salt: Enhances the overall flavor of the dish.
Black pepper: Adds a hint of spice and depth to the sauce.
Technique Tip for This Recipe
When slicing the potatoes, aim for uniform thickness to ensure even cooking. A mandoline slicer can be particularly helpful for achieving consistent slices. This will help the potatoes cook at the same rate and result in a more cohesive dish.
Suggested Side Dishes
Alternative Ingredients
Potatoes - Substitute with sweet potatoes: Sweet potatoes provide a different flavor profile and are rich in vitamins and fiber.
Unsweetened almond milk - Substitute with unsweetened soy milk: Soy milk has a similar consistency and neutral flavor, making it a good alternative for creamy dishes.
Nutritional yeast - Substitute with vegan parmesan: Vegan parmesan can provide a similar cheesy flavor and texture.
Olive oil - Substitute with coconut oil: Coconut oil can add a subtle sweetness and is a good fat alternative for cooking.
Garlic - Substitute with shallots: Shallots offer a milder, slightly sweet flavor that can complement the dish well.
Salt - Substitute with tamari: Tamari can add a rich umami flavor while also providing the necessary saltiness.
Black pepper - Substitute with white pepper: White pepper has a similar heat but a slightly different flavor profile, which can add a unique twist to the dish.
Other Alternative Recipes Similar to This Dish
How to Store / Freeze This Dish
Allow the au gratin potatoes to cool completely at room temperature before storing. This helps prevent condensation, which can make the dish soggy.
Transfer the cooled potatoes to an airtight container. If you don't have a container large enough, you can use a baking dish covered tightly with aluminum foil or plastic wrap.
Store the container in the refrigerator. The au gratin potatoes will keep well for up to 3-4 days.
For longer storage, consider freezing. Place the cooled potatoes in a freezer-safe container or heavy-duty freezer bag. Make sure to remove as much air as possible to prevent freezer burn.
Label the container with the date so you can keep track of how long it has been stored. Frozen au gratin potatoes can last up to 2-3 months.
When ready to reheat, if frozen, thaw the potatoes in the refrigerator overnight. This ensures even reheating and maintains the texture.
Preheat your oven to 350°F (175°C). Transfer the au gratin potatoes to an oven-safe dish if they are not already in one.
Cover the dish with aluminum foil to prevent the top from drying out. Bake for 20-30 minutes, or until heated through. If you prefer a crispy top, remove the foil during the last 5-10 minutes of reheating.
Alternatively, you can reheat individual portions in the microwave. Place a portion on a microwave-safe plate, cover with a microwave-safe lid or another plate, and heat on medium power for 2-3 minutes, or until hot. Stir halfway through to ensure even heating.
How to Reheat Leftovers
Oven Method: Preheat your oven to 350°F (175°C). Place the au gratin potatoes in an oven-safe dish. Cover with aluminum foil to prevent drying out. Heat for about 20-25 minutes, or until the potatoes are heated through. For a crispy top, remove the foil for the last 5 minutes of reheating.
Stovetop Method: Place the leftover potatoes in a non-stick skillet over medium heat. Add a splash of unsweetened almond milk to keep them moist. Stir occasionally to ensure even heating. Cook for about 10-15 minutes, or until the potatoes are warmed through.
Microwave Method: Transfer the au gratin potatoes to a microwave-safe dish. Cover with a microwave-safe lid or a damp paper towel to retain moisture. Heat on medium power for 2-3 minutes, stirring halfway through. Continue heating in 1-minute increments until fully warmed.
Air Fryer Method: Preheat your air fryer to 350°F (175°C). Place the leftover potatoes in the air fryer basket in a single layer. Heat for about 5-7 minutes, shaking the basket halfway through to ensure even heating. This method will help retain the crispy top layer.
Double Boiler Method: Fill a pot with a couple of inches of water and bring to a simmer. Place a heatproof bowl with the au gratin potatoes over the simmering water, ensuring the bowl does not touch the water. Cover the bowl and heat for about 15-20 minutes, stirring occasionally, until the potatoes are warmed through.
Best Tools for This Recipe
Oven: Used to bake the potatoes at a consistent temperature of 375°F (190°C) until they are tender and golden brown.
Baking dish: A dish to layer the sliced potatoes and hold the sauce while baking.
Saucepan: Used to heat the olive oil, cook the garlic, and simmer the almond milk mixture.
Knife: Essential for thinly slicing the potatoes.
Cutting board: Provides a stable surface for slicing the potatoes and mincing the garlic.
Measuring cups: Used to measure the almond milk and nutritional yeast accurately.
Measuring spoons: Used to measure the olive oil, salt, and pepper accurately.
Stirring spoon: Used to stir the sauce mixture in the saucepan.
Garlic press: Optional, but can be used to mince the garlic more efficiently.
Oven mitts: Protects your hands when placing the baking dish in and taking it out of the oven.
How to Save Time on This Recipe
Pre-slice potatoes: Use a mandoline slicer to quickly and evenly slice the potatoes.
Preheat oven: Start preheating the oven before you begin prepping to save time.
Use garlic paste: Substitute minced garlic with garlic paste to save chopping time.
Batch cook: Double the recipe and freeze half for a quick meal later.
Microwave potatoes: Partially cook the potatoes in the microwave for a few minutes before baking to reduce oven time.

Au Gratin Potatoes Recipe
Ingredients
Main Ingredients
- 4 cups thinly sliced potatoes
- 1 cup unsweetened almond milk
- ¼ cup nutritional yeast
- 2 tablespoon olive oil
- 2 cloves garlic, minced
- 1 teaspoon salt
- ½ teaspoon black pepper
Instructions
- Preheat your oven to 375°F (190°C).
- Layer the sliced potatoes in a baking dish.
- In a saucepan, heat the olive oil over medium heat. Add the minced garlic and cook until fragrant.
- Add the almond milk, nutritional yeast, salt, and pepper to the saucepan. Stir well and bring to a simmer.
- Pour the sauce over the potatoes, making sure they are evenly coated.
- Bake in the preheated oven for 45 minutes, or until the potatoes are tender and the top is golden brown.
Nutritional Value
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