Mushroom and Blue Cheese Potatoes Au Gratin

Lynnda Cloutier


Blue cheese, potatoes and mushrooms. A splendid side dish, with variations!Source unknown


★★★★★ 1 vote



  • ·
    6 medium potatoes, 2 lbs, peeled if desired and sliced thinly, 6 cups (slice in a food processor)
  • ·
    3 cups sliced cremini mushrooms
  • ·
    1 medium onion, chopped, ½ cup
  • ·
    2 large garlic cloves, minced
  • ·
    2 tbsp. olive oil or cooking oil
  • ·
    ¼ cup flour
  • ·
    1 tsp. salt
  • ·
    ¼ tsp. ground black pepper
  • ·
    3 cups milk
  • ·
    4 tsp. snipped fresh sage
  • ·
    1 cup crumbled blue cheese, 4 oz

How to Make Mushroom and Blue Cheese Potatoes Au Gratin


  1. Preheat oven to 350. Grease a 3 quart rectangular baking dish; set aside. In large pan, cook potatoes in boiling lightly salted water for 5 minutes. Drain and set aside.
  2. For sauce, in large pan, cook mushrooms, onions, and garlic in hot oil over medium heat til tender. Stir in flour, salt and pepper. Add milk, all at once. Cook and stir til thickened and bubbly. Stir in sage. Remove from heat.
  3. Layer half the potatoes in prepared dish. Pour in half of the sauce. Sprinkle with ½ cup cheese. Repeat with remaining potatoes and sauce. Cover dish with foil. Cover and chill remaining sauce.
  4. Bake for 35 minutes. Uncover and sprinkle top of gratin with remaining cheese. Bake for about 35 minutes more or til potatoes are tender and top is golden. Let stand for 10 minutes before serving. Makes 8 side dishes
  5. Variations: Parmesan Potatoes Au Gratin:
    Prepare as directed, except omit mushrooms and sage and substitute shredded Parmesan cheese for blue cheese.
    Apple Smoked Cheddar Gratin:
    Prepare as directed, except omit mushrooms. Cut 2 large cored Granny Smith apples into thin wedges. Reduce amount of sage in sauce to 2 teaspoons. Put half the apples over each layer of potatoes. Substitute smoked cheddar or Gouda for blue cheese.
    To make ahead: Assemble gratin as directed but do not preheat oven. Cover with plastic wrap and chill for up to 24 hours. Bake in a 350 oven for 50 minutes. Uncover and top with remaining cheese. Bake for 40 to 50 minutes more or til potatoes are tender.

Printable Recipe Card

About Mushroom and Blue Cheese Potatoes Au Gratin

Course/Dish: Potatoes

Show 5 Comments & Reviews

27 Easy Camping Recipes

27 Easy Camping Recipes

Kitchen Crew @JustaPinch

Getting ready for a weekend camping trip? Here are 27 easy, no-hassle, camping-friendly recipes that everyone will love!

What To Make With Christmas Leftovers

What to Make With Christmas Leftovers

Kitchen Crew

As much as my family eats multiple plates of food and leaves the table stuffed, we still seem to have a lot of leftovers after our Christmas dinner. I always...

20 Potato Side Dish Recipes

20 Potato Side Dish Recipes

Kitchen Crew @JustaPinch

Dinner isn’t a dinner without delicious potatoes on the side. Au gratin, scalloped, mashed, loaded...we could eat potatoes prepared in all of the ways. Easy to make and even easier...