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SideChef
Recipes
Comfort Food
Potato and Mushroom Gratin

13 INGREDIENTS • 11 STEPS • 1HR 50MINS

Potato and Mushroom Gratin

Recipe

4.5

2 ratings
You're gonna love this delicious Potato and Mushroom Gratin. Easy to assemble and results in a golden and creamy dish every single time. A no-fuss casserole loaded with earthy mushrooms and gruyère cheese, what's not to love?
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You're gonna love this delicious Potato and Mushroom Gratin. Easy to assemble and results in a golden and creamy dish every single time. A no-fuss casserole loaded with earthy mushrooms and gruyère cheese, what's not to love?
author_avatar
Compelled to Cook
Hello, I'm Nicole! I aim to help you elevate your everyday meals with recipes that make the most of your casual family breakfasts, weeknight dinners and entertaining occasions.
https://www.compelledtocook.com

1HR 50MINS

Total Time

$1.60

Cost Per Serving

Ingredients

Servings
8
us / metric
Salted Butter
2 Tbsp
Salted Butter
plus more for greasing dish
Cremini Mushroom
4 1/2 cups
Cremini Mushrooms, thinly sliced
or White Mushroom
Garlic
3 cloves
Garlic, minced
Heavy Cream
1 cup
Heavy Cream
Sour Cream
1 cup
Sour Cream
Kosher Salt
1 tsp
Kosher Salt
Ground Black Pepper
1/2 tsp
Ground Black Pepper
Ground Nutmeg
1 pinch
Ground Nutmeg
Milk
1/3 cup
Milk
All-Purpose Flour
2 Tbsp
All-Purpose Flour
Russet Potato
2.5 lb
Russet Potatoes
or Red Potato
Gruyère Cheese
1 1/2 cups
Gruyère Cheese, shredded
Fresh Parsley
to taste
Chopped Fresh Parsley
or Sliced Scallion
optional

Nutrition Per Serving

VIEW ALL
Calories
411
Fat
25.2 g
Protein
12.9 g
Carbs
34.0 g
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Compelled to Cook
Hello, I'm Nicole! I aim to help you elevate your everyday meals with recipes that make the most of your casual family breakfasts, weeknight dinners and entertaining occasions.
https://www.compelledtocook.com

Author's Notes

Russet potatoes work well for this recipe. However, I've also used red potatoes with equally good results.

The covered cooking time will vary slightly depending on how thin you've sliced the potatoes. I find cutting them by hand instead of using a mandolin requires closer to 60 minutes covered.

I like using cremini mushrooms for this recipe as they have a little more earthiness than regular white mushrooms. However, either works well as does a mix of mushrooms.

Cooking Instructions

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step 1
Preheat oven to 375 degrees F (190 degrees C) and butter a large 3-quart casserole dish.
step 2
Melt Salted Butter (2 Tbsp) in a large skillet over medium-high heat until starting to foam. Add Cremini Mushrooms (4 1/2 cups) and cook until lightly browned and the moisture has evaporated.
step 3
Add Garlic (3 cloves) and continue to cook, stirring often for 1-2 minutes. Set aside.
step 4
While mushrooms are cooking, whisk together the Heavy Cream (1 cup), Sour Cream (1 cup), Kosher Salt (1 tsp), Ground Black Pepper (1/2 tsp), and Ground Nutmeg (1 pinch).
step 5
In a separate bowl whisk together the Milk (1/3 cup) and All-Purpose Flour (2 Tbsp) until smooth. Add to the sour cream and heavy cream and whisk until incorporated.
step 6
Peel and thinly slice Russet Potatoes (2.5 lb).
step 7
Spread half of the potato slices evenly on the bottom of the prepared casserole dish. Scatter half of the sauteed mushroom and half of the Gruyère Cheese (1 1/2 cups) evenly over the potatoes. Repeat with remaining potatoes, mushrooms, and cheese.
step 8
Pour the cream mixture evenly over the potatoes. Give the pan a gentle shake to help flatten everything out.
step 9
Cover and bake for 45-60 minutes (this will depend on how thin you've sliced the potatoes). Start checking at 45 minutes. The potatoes should be almost tender in the center.
step 10
Remove the cover and bake for an additional 20 minutes until the top is golden.
step 11
Remove from oven and allow to rest for 10 minutes before serving. Garnish with Fresh Parsley (to taste) if desired.
step 11 Remove from oven and allow to rest for 10 minutes before serving. Garnish with Fresh Parsley (to taste) if desired.

Tags

Comfort Food
Lunch
Shellfish-Free
Dinner
Mushrooms
French
Vegetarian
Potatoes
Side Dish
Vegetables
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