In this simple, cheesy sweet potato gratin recipe, sweet potatoes, gruyere, cheddar, garlicky cream, and fresh thyme come together to create a delicious twist on the classic potato au gratin casserole.
A cheesy sweet potato gratin
I would almost always choose sweet potatoes over regular potatoes, and this sweet potato gratin – a vibrant, seasonal twist on the classic potatoes au gratin casserole – is no exception.
It’s a simple recipe: layers of sliced sweet potatoes baked until bubbly in a garlicky cream sauce with a triple dose of cheesy goodness and fresh herbs; at its heart cozy comfort food that’s perfect for holiday entertaining and sure to become a seasonal favorite.
Here’s what you’ll need to make this gratin
- sweet potatoes
- gruyére, sharp cheddar, and parmesan cheeses
- olive oil
- salt and pepper
Find all the exact measurements and full recipe instructions below.
Other cozy comfort foods to cook next:
- Simple homemade chicken ramen
- Lemony kale and white bean soup
- Pasta with broccoli and chicken sausage
- Butternut squash noodle soup
- Spinach and ricotta stuffed shells
If you make this sweet potato gratin recipe, be sure to tag me on Instagram with the hashtag #forkknifeswoon and leave a comment and rating below letting me know how you liked it! ★★★★★ Star ratings are especially helpful because they help others find my recipes too. xo, LauraPrint
Originally published on December 11, 2012. Updated recipe photos by Jenn Davis, of the lovely baking blog Two Cups Flour added November 2018.