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RECIPE
14 INGREDIENTS 10 STEPS 1hr 20min

Sweet Potato Gratin

Move over sweet potatoes with sweet toasty marshmallow tops, or roasted sweet potatoes - there is a new kid in town! Layered with fresh herbs, garlic, heavy cream and authentic Gruyere cheese and shredded Parmesan Reggiano cheese, the tender and savory flavor will absolutely melt in your mouth!
Sweet Potato Gratin Recipe | SideChef
Move over sweet potatoes with sweet toasty marshmallow tops, or roasted sweet potatoes - there is a new kid in town! Layered with fresh herbs, garlic, heavy cream and authentic Gruyere cheese and shredded Parmesan Reggiano cheese, the tender and savory flavor will absolutely melt in your mouth!
My name is Diane, but you can call me Mama V! I'm the recipe developer, photographer, writer and website designer behind Snowflakes & Cupcakes! Thanks for stopping by!
https://www.snowflakesandcoffeecakes.com/
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My name is Diane, but you can call me Mama V! I'm the recipe developer, photographer, writer and website designer behind Snowflakes & Cupcakes! Thanks for stopping by!
https://www.snowflakesandcoffeecakes.com/
1hr 20min
Total Time
$3.47
Cost Per Serving

Ingredients

Servings
8
US / METRIC
3 cups
Heavy Cream
1/2 Tbsp
1 tsp
Freshly Ground Black Pepper
3 cloves
Garlic , minced
1 Tbsp
crushed before chopping
1 Tbsp
Chopped Fresh Sage
crushed before chopping
1 tsp
crushed before chopping
1 1/4 tsp
Freshly Grated Whole Nutmeg
1/4 tsp
Cayenne Pepper
2 1/2 cups
Grated Gruyère Cheese
or Swiss Cheese
2 cups
Grated Parmigiano-Reggiano
to taste
for garnish
Save Time,
Shop Ingredients
Make grocery shopping easy! Add recipes to your cart, review your ingredients and checkout online with Walmart.
Delivery & Pickup From
Estimated Total: Estimated Total:
Fulfilled by
For every order you place, SideChef is contributing towards ending hunger in America.

Nutrition Per Serving

VIEW ALL
CALORIES
716
FAT
49.0 g
PROTEIN
22.9 g
CARBS
44.7 g

Author's Notes

For best results, weigh the potatoes on a kitchen/digital scale before starting to make sure you have the correct amounts – it really does make a difference!

Cooking Instructions

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Step 1
In a medium bowl, whisk together the Heavy Cream (3 cups) , Salt (1/2 Tbsp) , Freshly Ground Black Pepper (1 tsp) , Garlic (3 cloves) , Fresh Thyme (1 Tbsp) , Fresh Rosemary (1 tsp) , Fresh Sage (1 Tbsp) , Whole Nutmeg (1 1/4 tsp) and Cayenne Pepper (1/4 tsp) . Set aside.
Step 2
Mix together the Gruyère Cheese (2 1/2 cups) and Parmigiano-Reggiano (2 cups) . Set aside.
Step 3
Peel Sweet Potatoes (6 cups) and Russet Potatoes (4 1/2 cups) .  Using a handheld mandolin slicer or a sharp knife, slice potatoes into thin rounds (somewhere between 1/16 and ¼-inch thick slices). Be careful with the mandolin slicer – most common form of severe cuts in the kitchen!
Step 4
Preheat oven to 425 degrees F (220 degrees C). Spray a 9x13-inch casserole dish with non-stick cooking spray.
Step 5
Pour ½ cup of the cream mixture on the bottom (this helps keep the potatoes from sticking to the bottom and burning). Layer one layer of sweet potato slices in a circular pattern, overlapping them slightly.
Step 6
Drizzle ¾ cup of the cream mixture on top, then sprinkle 1 cup of cheese on top. Next layer with white potato slices, drizzle ¾ cup of cream mixture, and sprinkle with 1 cup of cheese on top.
Step 7
Finish with final layer of sweet potato slices, drizzle with remaining cream mixture, and sprinkle with remaining shredded cheese. Garnish with Fresh Thyme (to taste) .
Step 8
Cover with foil and bake for 15 minutes.
Step 9
Remove the foil, reduce heat to 400 degrees, and bake until the top is golden and bubbly, 45 to 50 minutes.
Step 10
Remove from oven and let cool slightly before serving. The sauces and cheese will thicken slightly as it sits.
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Nutrition Per Serving
Calories
716
% Daily Value*
Fat
49.0 g
63%
Saturated Fat
33.2 g
166%
Trans Fat
0.0 g
--
Cholesterol
181.5 mg
60%
Carbohydrates
44.7 g
16%
Fiber
4.6 g
16%
Sugars
5.4 g
--
Protein
22.9 g
46%
Sodium
1101.0 mg
48%
Vitamin D
0.2 µg
1%
Calcium
813.9 mg
63%
Iron
1.6 mg
9%
Potassium
863.9 mg
18%
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