Grandma's Famous Potatoes Au Gratin

READY IN: 1hr 15mins
Recipe by The Spice Guru

My late grandmother's delicious recipe for Potatoes Au Gratin is a family favorite.

Top Review by Portlandwoman86

This was fantastic! Your grandmother had one amazing recipe. Thank you so much for sharing it with us and taking the time to make it perfect. This is my new favorite!

Ingredients Nutrition


  1. PREHEAT oven to 400°F; MEASURE the GROUP ONE ingredients into a small bowl (3 tablespoons parmesan cheese, 1 1/2 teaspoons kosher salt and 1/2 teaspoon ground black pepper); MIX well with fork; SET aside.
  2. PEEL and slice potatoes thinly; PEEL and slice onions thinly (into rings); GRATE 3 cups sharp cheddar cheese.
  3. LIGHTLY grease a 2.5 quart dish or 9x13 baking dish; LAYER 1/3 of the potatoes, 1/2 of the onion, 1/3 of the cheese, and 1/3 of the GROUP ONE mixture.
  4. REPEAT layers, finishing with with remaining potatoes, the remaining GROUP 1 mixture, and the remaining cheese.
  5. COMBINE 1 cup heavy cream with 3/4 cup strong chicken broth and 1/4 cup dry white wine in a bowl; ADD 1 teaspoon rubbed sage, 1/2 teaspoon prepared horseradish (or 1/2 teaspoon dry mustard), and 1 dash ground nutmeg; WHISK mixture well; POUR mixture evenly over potatoes.
  6. SPRINKLE 1/8 cup powdered parmesan cheese, 1 dash paprika, 1 dash freshly cracked pepper and 1/2 teaspoon chives or parsley, evenly over the top of mixture in baking dish for the GARNISH.
  7. BAKE 1 hour.
  8. ALLOW to stand about 10 minutes to cool and set, before serving.
  9. SERVE.
  10. GET READY to melt into your seat after just one taste!

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