Honestly, I just don’t know many things that taste better than the crispy, cheesy potatoes on the top of this Three Cheese Au Gratin Potato dish…
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Three Cheese au Gratin Potatoes garnished with chives in green casserole dish


How to Make Three Cheese Au Gratin Potatoes

This is definitely comfort food, made from scratch like grandma used to make.

Three Cheese au Gratin Potatoes garnished in a casserole dish


Always start with all the best ingredients, fresh Yukon gold potatoes, sharp cheddar, colby jack and Parmesan cheese, green onions and milk.

The ingredients for Three Cheese Au Gratin Potatoes: potato slices, green onions, shredded cheddar , parmesan and colby jack


Making the Cheese Sauce:

Of course feel free to improvise when it comes to cheese, I do. For instance when I want to spice things up, I substitute the jack cheese for pepperjack.

This recipe is actually very easy, but if there were a tricky part it would be making the sauce, seeing pictures should help you out.

A “Roux” is a French word pronounced ‘roo’. A roux thickens sauces and is usually a combination of butter and flour. Helpful hint: if you want the sauce to thicken a little quicker, warm milk before adding to roux.

A series of four photos depicting how to make a cheese sauce for Three Cheese Au Gratin Potatoes

Sorry, I have to be a food snob here, if you use packaged pre-shredded cheese your sauce will come out clumpy and oily…true story. So please grate your own cheese.

You can slice your potatoes with a knife or use a food processorit is quicker and you can use it for the cheese too!

A series of photos showing how to layer potatoes, green onions and cheese sauce for Three Cheese Au Gratin Potatoes

Don’t worry that the sauce does not cover all the potatoes! It spreads out as it cooks, I promise.

Three Cheese Au Gratin Potatoes before baking

Three Cheese Au Gratin Potatoes in oven beginning to get golden


After 20 minutes of cooking you can see that the cheese sauce has spread out and is beginning to brown. And after 50 minutes…perfection! This same cheese sauce can be used over steamed vegetables or cooked pasta for homemade macaroni and cheese.

Three cheese au gratin potatoes with crispy top



The Recipe: Three Cheese Au Gratin Potatoes

What you need: an 8×8 baking dish, or if you want to double the recipe, a 9X13 baking dish.

4.67 from 3 votes
Three Cheese Au Gratin Potatoes
Prep Time
20 mins
Cook Time
50 mins
Total Time
1 hr 10 mins

A delicious creamy potato side dish. The recipe below is for four and is made in an 8x8 baking dish. If feeding a larger group, double recipe and use a 13 x 9 inch glass baking dish.

Course: Side Dish
Cuisine: American
Keyword: easy side dish recipe, holiday recipe, kid-friendly recipes
Servings: 4 servings
Author: Linda Spiker
  • 4-5 med russet or Yukon gold potatoes, peeled and sliced
  • 1 cup milk
  • 1 cup jack cheese, freshly grated
  • 1 cup sharp cheddar, freshly grated
  • ½ cup Parmesan, freshly grated
  • 2 Tablespoons butter
  • 2 teaspoon flour
  • 6 green onions, sliced thinly
  • 1 teaspoon sea salt
  • 1 teaspoon freshly ground pepper
  1. Preheat oven to 375 degrees and place oven rack in center position.
  2. Grate all cheeses and toss together.
  3. Set milk in a pan and warm.
  4. Peel and thinly slice your potatoes, set aside.
  5. In a large saucepan on medium heat melt butter, add salt and pepper.
  6. Add flour to melted butter and whisk. This is your roux, it will thicken your cheese sauce.
  7. Slowly add warm milk to the roux, continually whisking and heat until mixture begins to thicken.

  8. When milk is thickened, add cheese a handful at a time (retaining the ½ cup for later) whisk cheese, slowly adding more as each handful melts.
  9. When cheese is completely melted and sauce is smooth turn off heat.
  10. Place a layer of potatoes in 8x8 glass baking dish, sprinkle with freshly ground pepper, a little sea salt and sliced green onions. Drizzle some cheese sauce over potatoes. Don’t worry about covering every nook and cranny, the cheese sauce will spread out as the potatoes bake. Repeat layering (potatoes, salt, pepper, onions) two more times or until all potatoes and cheese sauce are used. Again, don’t worry if potatoes are not completely covered with sauce. As they bake the sauce thins out, melts and covers any empty spots. Sprinkle reserved cheese over the top. Bake for 50 minutes or until potatoes are soft and cheese sauce is browned and crispy on top. Sorry, I just drooled a little.


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Post tags: holiday, holidays, side dish,