If you’re looking for a side dish that feels luxurious, comforting, and impressive without being overly complicated, this potato gratin is exactly what you need.Dairy & Eggs
This version takes the classic French gratin and elevates it with deeply caramelized onions and nutty Parmesan cheese, creating a dish that’s rich, silky, and packed with flavor in every bite.
🥔 Why This Recipe Is Better
Richer Flavor
Caramelized onions add a deep, sweet-savory complexity you won’t get from a basic gratin.
Perfect Texture
Cream + potato starch creates a naturally thick, silky sauce—no flour needed.Cheese
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Cheesecakes
Snacks
Butter
Golden, Crispy Top
Parmesan melts and browns beautifully, giving you that irresistible crust.
Make-Ahead Friendly
Perfect for holidays, dinner parties, or meal prep.
🧾 Ingredients
3 lbs potatoes (Russet or Yukon Gold), thinly sliced
2 tbsp butter (for onions)
2 large onions, thinly sliced
2 cups heavy cream
1 cup finely grated Parmesan (+ extra for topping)
1½ tsp salt (divided)
1 tsp black pepper
2 tsp fresh thyme (or 1 tsp dried)
Butter or spray (for greasing dish)
👩🍳 Step-by-Step Instructions
1. Preheat Oven
Set oven to 375°F (190°C) and grease a 9×13-inch baking dish.Fruits & Vegetables
2. Caramelize the Onions
Cook onions in butter over medium heat for 20–25 minutes, stirring occasionally until soft, golden, and sweet.
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