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Grandma’s Famous Potatoes Au Gratin

The scent alone could transport me back to Grandma Elsie’s kitchen. I remember the warmth radiating from the oven, the tantalizing aroma of cheese mingling with earthy potatoes, and the comforting feeling that everything was right in the world. Her Potatoes Au Gratin weren’t just a side dish; they were a symbol of family, love, and the simple joy of sharing a meal together. Every holiday, every special occasion, they were there, a golden, bubbling testament to her culinary prowess, and now, I’m so excited to share her treasured recipe with you.

Recipe Overview

Prep Time: 30 minutes
Cook Time: 60 minutes
Total Time: 1 hour 30 minutes
Servings: 12
Dietary Type: Vegetarian

Ingredients

GROUP ONE: Seasoning Mix

3 tablespoons grated Parmesan cheese
1/2 teaspoon freshly cracked black pepper
1 1/2 teaspoons kosher salt

GROUP TWO: Main Ingredients

3 lbs Yukon Gold potatoes, peeled and sliced thin
1 yellow onion, sliced into thin rings
3 cups shredded sharp Cheddar cheese

GROUP THREE: Cream Sauce

1 cup heavy cream
3/4 cup strong chicken broth
1/4 cup dry white wine
1 teaspoon rubbed sage
1/2 teaspoon prepared horseradish (or 1/2 teaspoon dry mustard)
1 dash ground nutmeg

GARNISH

2 tablespoons powdered Parmesan cheese
1 dash paprika
Parsley flakes

Equipment Needed

2.5 quart dish or 9×13 baking dish
Small bowl
Fork
Large bowl
Whisk

Instructions

Begin by preheating your oven to 400°F (200°C). This ensures the potatoes cook evenly and the cheese melts beautifully.
Next, prepare the seasoning mix. In a small bowl, measure out 3 tablespoons of grated Parmesan cheese, 1 1/2 teaspoons of kosher salt, and 1/2 teaspoon of freshly cracked black pepper. Mix these ingredients thoroughly with a fork until well combined. Set aside the seasoning mix for later.
Now, it’s time to prepare the vegetables. Peel and slice 3 lbs of Yukon Gold potatoes thinly. A mandoline slicer can be helpful for achieving uniform slices, but a sharp knife will also do the trick. The thinner the slices, the faster and more evenly they will cook. Also, peel and slice 1 yellow onion into thin rings.
Grate 3 cups of sharp Cheddar cheese. While pre-shredded cheese can save time, freshly grated cheese melts more smoothly and provides a superior flavor.
Lightly grease a 2.5 quart dish or a 9×13 baking dish. This will prevent the potatoes from sticking and make serving easier.
Now comes the fun part: layering! Layer 1/3 of the potato slices in the prepared baking dish, overlapping them slightly. Top with 1/2 of the onion rings, spreading them evenly over the potatoes. Sprinkle 1/3 of the shredded Cheddar cheese over the onions, followed by 1/3 of the GROUP ONE seasoning mixture.
Repeat the layers – another 1/3 of the potatoes, the remaining half of the onion, another 1/3 of the cheese, and another 1/3 of the seasoning mix.
For the final layer, arrange the remaining potatoes in the dish. Sprinkle the remaining GROUP ONE seasoning mixture evenly over the potatoes, and top with the remaining shredded Cheddar cheese.
Prepare the creamy sauce. In a large bowl, combine 1 cup of heavy cream, 3/4 cup of strong chicken broth, and 1/4 cup of dry white wine. Add 1 teaspoon of rubbed sage, 1/2 teaspoon of prepared horseradish (or 1/2 teaspoon of dry mustard, if preferred), and 1 dash of ground nutmeg.
Whisk the cream sauce mixture well to ensure all ingredients are thoroughly combined.
Pour the cream sauce mixture evenly over the potatoes in the baking dish, making sure it seeps down into the layers.
For the garnish, sprinkle 2 tablespoons of powdered Parmesan cheese, 1 dash of paprika, and some parsley flakes evenly over the top of the mixture in the baking dish. This will create a beautiful golden crust and add a pop of color.
Bake in the preheated oven for 1 hour. The potatoes are done when they are tender and easily pierced with a fork, and the cheese is melted and bubbly. If the top starts to brown too quickly, you can tent the dish with aluminum foil for the last 15-20 minutes of baking.
Once baked, allow the Potatoes Au Gratin to stand for about 10 minutes to cool and set before serving. This will help the sauce thicken slightly and make it easier to slice.
Serve and enjoy!

Expert Tips & Tricks

For an extra layer of flavor, try sautéing the onion in a little butter or olive oil before layering it with the potatoes.
If you don’t have dry white wine on hand, you can substitute with a tablespoon of white wine vinegar or lemon juice for a similar tang.
To prevent the potatoes from browning too much on top, cover the dish with foil during the last 15-20 minutes of baking.
Don’t overcook the potatoes! You want them to be tender, but not mushy. A fork should easily pierce through them.
You can assemble the Potatoes Au Gratin ahead of time and store them in the refrigerator for up to 24 hours before baking. Just add a few minutes to the baking time.

Serving & Storage Suggestions

Grandma’s Potatoes Au Gratin are a perfect side dish for almost any meal. They pair beautifully with roasted chicken, grilled steak, or even a simple salad. To serve, carefully slice the potatoes into squares and arrange them on a serving platter. Garnish with a sprinkle of fresh parsley or chives for added visual appeal.

Leftovers can be stored in an airtight container in the refrigerator for up to 3-4 days. To reheat, simply microwave until warmed through, or bake in a preheated oven at 350°F (175°C) until heated and bubbly. While freezing is possible, the texture of the potatoes and cheese may change slightly upon thawing.

Nutritional Information

Nutrient	Amount per Serving	% Daily Value
Calories	300.7 kcal	N/A
Calories from Fat	157 kcal	N/A
Total Fat	17.5 g	26%
Saturated Fat	10.9 g	54%
Cholesterol	58.7 mg	19%
Sodium	558 mg	23%
Total Carbohydrate	25 g	8%
Dietary Fiber	2.3 g	9%
Sugars	1.7 g	N/A
Protein	10.8 g	21%

Variations & Substitutions

Dairy-Free: Substitute the heavy cream with full-fat coconut milk or cashew cream. Use a plant-based shredded cheese alternative, and omit the Parmesan cheese, replacing it with nutritional yeast for a cheesy flavor.
Spicy: Add a pinch of cayenne pepper or a dash of hot sauce to the cream sauce for a little kick.
Vegetable Boost: Incorporate other vegetables like sliced mushrooms, bell peppers, or spinach into the layers for added nutrients and flavor.
Different Cheeses: Experiment with different types of cheese, such as Gruyere, Fontina, or Pepper Jack, to create unique flavor profiles.
Herbs: Swap out the rubbed sage for thyme, rosemary, or oregano for a different herbal note.

FAQs (Frequently Asked Questions)

Q: Can I use russet potatoes instead of Yukon Gold?
A: While Yukon Gold potatoes are preferred for their creamy texture and slightly sweet flavor, russet potatoes can be used as a substitute. However, they may require a bit more cooking time, and the end result might be slightly drier.

Q: Can I make this dish ahead of time?
A: Absolutely! You can assemble the Potatoes Au Gratin up to 24 hours in advance. Just cover the dish tightly with plastic wrap and store it in the refrigerator. Add about 15-20 minutes to the baking time to ensure the potatoes are fully cooked.

Q: What if I don’t have horseradish?
A: No problem! If you don’t have prepared horseradish, you can use 1/2 teaspoon of dry mustard as a substitute. This will still provide a subtle tang and enhance the overall flavor of the dish.

Q: How do I prevent the cheese from browning too quickly?
A: If the top of the Potatoes Au Gratin starts to brown too quickly, tent the dish with aluminum foil for the last 15-20 minutes of baking. This will help to prevent the cheese from burning while allowing the potatoes to continue cooking.

Q: Can I freeze leftovers?
A: While you can freeze leftovers, be aware that the texture of the potatoes and cheese may change upon thawing. To freeze, allow the Potatoes Au Gratin to cool completely, then wrap tightly in plastic wrap and place in a freezer-safe container. Thaw overnight in the refrigerator before reheating.

Final Thoughts

Grandma Elsie’s Potatoes Au Gratin is more than just a recipe; it’s a tradition, a memory, and a taste of home. I encourage you to try this recipe and create your own cherished memories. Feel free to experiment with variations and substitutions to make it your own. And please, share your feedback and experiences – I’d love to hear how it turns out for you! Serve it alongside your favorite main course and a glass of crisp white wine for the perfect comforting meal. Enjoy!

Grandma’s Famous Potatoes Au Gratin Recipe