Cheesy Sweet Potato Gratin

Indulge in something satisfying and filling with this Cheesy Sweet Potato Gratin. Made with sweet potatoes, loads of spices, almond milk, and gruyere cheese, it’s a cozy and delightful dish that’s perfect as a side or a main course.

Sweet potatoes, but make them cheesy

If you’ve been looking for a cheesy potato dish perfect as a side or an indulgent main course, you’ve come to the right place.

This cheesy sweet potato gratin takes everything yummy about sweet potatoes and layers them under a bed of spices and golden brown gruyere cheese.

This is one of my favorite sweet potato recipes ever, as it is the potato casserole to end all potato casseroles!

As for the gratin part of the title, this simply refers to the browned cheese. A gratin can be any browned top layer of a dish, whether breadcrumbs, cheese, butter, etc. It gives things a nice flavor and is the perfect finishing touch, especially atop a casserole.

Ingredients used to make cheesy sweet potato gratin

Our cheesy sweet potato gratin recipe comes together by using 10 ingredients. We’ll start with the potatoes, and then move into an almond milk, shallot, and spice mixture. Finally, we’ll be using delicious gruyere cheese on top.

• Sweet potatoes: For this baked sweet potato recipe, you’ll need 3 lbs of peeled potatoes.
• Avocado oil: We’ll be using 2 tbsp of avocado oil to sauté the shallots and spices.
• Shallots: As for the shallots, you’ll need 2 , diced into small pieces.
• Garlic: Garlic is a must! This recipe tastes great with 2 cloves, minced.
• Nutmeg: Next up for spices, we’ll be using 1/2 tsp of nutmeg.
• Thyme: 1 tsp of dried thyme will give the sweet potato bake the perfect amount of herby flavor.
• Salt: As for the salt, use just a dash (1 tsp).
• Pepper: 1/4 tsp of pepper will be plenty.
• Almond milk: Grab 1/4 cup of almond milk to use as part of the middle layer of the casserole.
• Gruyere: Finally, 6oz of gruyere cheese will be used on top. We’ll broil it until it reaches a golden brown color.

Kitchen items you’ll need to make baked sweet potatoes

You’ll need a decent number of kitchen tools to create your own cheesy gratin recipe. Start with a baking dish (I like to use an 8×11), followed by the cutting items, a sauce pot, and foil.

• Baking dish
• Potato peeler
• Vegetable slicer
• Cutting board
• Chopping knife
• Sauce pan
• Stirring utensil
• Aluminum foil
• Measuring cups: 1/4 tsp, 1/2 tsp, 1 tsp, 1 tbsp, 1/4 cup

How to make cheesy sweet potato gratin

The secret lies in the layering. Start by lining your baking sheet with slices of potato, then layer on a delicious shallot, milk, and spice mixture. Finally, layer the top with the rich gruyere for broiled, browned perfection!

To begin, preheat the oven to 350F and grease an 8×11 baking dish.

Slice the peeled potatoes into very thin slices, about 1/8 inch each. Line them up in the casserole dish. They should be close together but not overlapping.

Next, heat the avocado oil and shallots in a saucepan over medium-high heat. Cook them for two minutes and then add the garlic, nutmeg, thyme, salt, and pepper. Let cook for about 4-5 minutes, or until softened.

Once cooked, turn off the heat and stir in the almond milk. Then, pour the mixture evenly over the sweet potatoes.

Add the shredded gruyere evenly on top.

Cover with foil and bake for 40 minutes. Once time is up, remove the foil and cook for another 20 minutes.

Broil for 4 minutes at the end to brown the cheese, and keep a close eye to avoid burning.

Let sit for 20 minutes, and then enjoy!

Ingredient substitutes

There are a few items in this recipe that can be swapped. This is useful if you’re missing an item or have something else that you’d like to use!

Garlic Cloves
Don’t have garlic cloves handy? You can use powder! For this recipe, you’ll need 1/4 tsp to substitute the 2 cloves that it calls for.

Almond Milk
Almond milk is my go-to for this recipe, but any milk will work. You can use oat, coconut, or even regular dairy milk.

Gruyere
Though I love to use gruyere for its yummy Swiss flavor, you can also use comté, or even parmesan.

How to store cheesy sweet potato gratin

Keep leftovers in a refrigerated, airtight container and enjoy within 3 days.

More potato recipes to enjoy

You can never have too many potatoes, especially in the fall! Dig into these yummy recipes to get your potato fix. Choose from buffalo-flavored potatoes, roasted options, skillets, and more!

• Buffalo Chicken Sweet Potato Casserole
• Healthy Sweet Potato Muffins
• One Pan Cabbage and Potato Skillet
• Easy Roasted Breakfast Potatoes
• Healthier Sweet Potato Casserole

Recipe by Erin Morrissey + Photos by Quarter Soul Crisis