cheesy potato mushroom casserole

Name: Cheesy Potato Mushroom Casserole
Prep time: 30 min
Cook time: 1 h 35 min
Yield: 6
Cuisine: American
Ingredients: 3 - 4 large Idaho potatoes, peeled and thinly sliced; 1 teaspoon(s) minced garlic; 1 stick(s) butter; 1 pound(s) mushrooms, any kind you prefer; 4 slice(s) deli Swiss cheese; 1 1/2 cup(s) shredded Italian-style cheese; 1/2 large onion, diced; 1 pint(s) whipping cream; - salt and pepper, to taste

(2 RATINGS)

469 Pinches 8 Photos

Myra Lawrence

Las Vegas, NV

Updated on Mar 27, 2023

My BFF made this casserole for me and I loved it so much that she gave me the recipe. She passed away two months later. I miss her so much! I thought I would share this recipe in her memory. It is delicious with steak or ham.

Rate

Serving the Cheesy Potato Mushroom Casserole.

Blue Ribbon Recipe

This potato casserole is similar to au gratin potatoes, with the addition of hearty mushrooms and onions. If you can't tolerate dairy, this recipe may not be for you because it's super cheesy. It uses Italian-style shredded cheese, Swiss cheese, and whipping cream. Once baked, this cheesy potato mushroom casserole is rich and creamy. A delicious and decadent side dish.

— The Test Kitchen

prep time 30 Min

cook time 1 Hr 35 Min

method Bake

yield 6 - 8 or me LOL

Ingredients

3 - 4 large Idaho potatoes, peeled and thinly sliced
1 teaspoon minced garlic
1 stick butter
1 pound mushrooms, any kind you prefer
4 slices deli Swiss cheese
1 1/2 cups shredded Italian-style cheese
1/2 large onion, diced
1 pint whipping cream
- salt and pepper, to taste

How To Make cheesy potato mushroom casserole

Test Kitchen Tips

We cut the onions into slices and added them to the baking dish. Then we realized they should have been diced. In case you also make that mistake, it still works.

Step 1

Preheat oven to 375 degrees. Grease a 9 X 13 baking pan with cooking spray on the bottom. Cover the bottom of the pan with a layer of potatoes. Sprinkle salt and pepper, along with some of the minced garlic and onion.

Step 2

Add half of the mushrooms.
Step 3

Add pats of butter and then layer slices of Swiss cheese.
Step 4

Do another layer but use shredded cheese, the last layer should be the remainder of the potatoes and cheese.
Step 5

Pour the pint of whipping cream over the top.
Step 6

Bake for 1 hour and then check the potatoes with a sharp knife to check to see if potatoes are cooked through. If not, bake for another 1/2 hour (depending on oven).
Step 7

Remove from oven, casserole will be bubbling and cheesy. I always let it sit for 10 minutes or so to let it set and cool a bit. I hope that you enjoy it!
Last Step: Don't forget to share! Post a picture of your finished recipe here and on your favorite social network. Don't forget to tag Just A Pinch and include #justapinchrecipes!

Discover More

Comment & Reviews

Just A Pinch Sweepstakes