Creamy Potato Gratin for Easy Dinner Sides

Creamy Potato Gratin is the ultimate comfort food side dish. After making this countless times, I’ve discovered the secret to perfectly creamy potatoes every time. The golden, crispy edges and rich, creamy center will make your family beg for more. Jump to the recipe card or keep reading for my best tips, including how to prevent soggy potatoes. If you love recipes like this, you’ll also enjoy Easy S’mores Cookie Cake Recipe Perfect for Dessert and Creamy Chicken Stroganoff with Mushrooms and Egg Noodles.

What You'll Need for Creamy Potato Gratin for Easy Dinner Sides

Choosing the right ingredients makes a big difference, but this recipe is forgiving enough to work with what you have.

• 2 lbs russet potatoes
• 1 cup heavy cream
• 1 cup grated Gruyère cheese
• 1/2 cup grated Parmesan cheese
• 1 tsp salt
• 1/2 tsp black pepper
• 1/2 tsp garlic powder
• 1/2 tsp onion powder
• 1/2 tsp dried thyme
• Optional: Fresh parsley, chopped (for garnish)

How to Make Creamy Potato Gratin for Easy Dinner Sides

1. Preheat oven: Preheat oven to 375°F (190°C).
2. Slice potatoes: Using a mandoline slicer or sharp knife, slice potatoes into 1/8-inch rounds.
3. Prepare cream mixture: In a bowl, whisk together heavy cream, salt, black pepper, garlic powder, onion powder, and dried thyme.
4. Layer potatoes: In a 9×13-inch baking dish, arrange a layer of potatoes, overlapping slightly. Pour 1/3 of the cream mixture over the potatoes. Sprinkle with 1/3 of the Gruyère and Parmesan cheeses. Repeat with two more layers.
5. Bake: Cover the baking dish with aluminum foil and bake for 30 minutes. Remove foil and bake for an additional 20-25 minutes, or until potatoes are tender and golden brown.
6. Serve: Let rest for 5 minutes, then garnish with fresh parsley and serve.

Storing & Reheating Creamy Potato Gratin for Easy Dinner Sides

Short-Term Storage

Store in an airtight container in the fridge. Store leftovers in an airtight container in the fridge for up to 4 days. Make-ahead tip: Assemble the gratin up to 24 hours ahead. Add 10-15 minutes to the baking time.

Freezing Creamy Potato Gratin for Easy Dinner Sides

Freeze individual portions for up to 2 months. Thaw overnight in the fridge before reheating.

How to Reheat Without Drying It Out

Oven: Reheat in a 350°F (175°C) oven for 15-20 minutes or until heated through. Microwave: Reheat in the microwave for 1-2 minutes or until heated through. Add a splash of milk to prevent drying out.

Recipe Notes

• Chef tip: For a lighter version, substitute half-and-half for the heavy cream.
• Best substitution: Swiss cheese can be substituted for Gruyère.
• Make-ahead: Assemble the gratin up to 24 hours ahead. Add 10-15 minutes to the baking time.
• Scaling: This recipe can be halved or doubled depending on your needs.
• Troubleshooting: If the potatoes are still hard after baking, cover the dish with foil and bake for an additional 10-15 minutes.

Creamy Potato Gratin for Easy Dinner Sides

⏱

Prep

20 mins

🍳

Cook

50 mins

⏳

Total

1 hr 10 mins

🍽

Serves

6 servings

🥗

Diet

Gluten-free

Ingredients

Main Ingredients

• 2 lbs russet potatoes
• 1 cup heavy cream
• 1 cup grated Gruyère cheese
• 1/2 cup grated Parmesan cheese

Seasonings

• 1 tsp salt
• 1/2 tsp black pepper
• 1/2 tsp garlic powder
• 1/2 tsp onion powder
• 1/2 tsp dried thyme

Optional Toppings

• Fresh parsley, chopped (for garnish)

Instructions

1. Preheat oven: Preheat oven to 375°F (190°C).
2. Slice potatoes: Using a mandoline slicer or sharp knife, slice potatoes into 1/8-inch rounds.
3. Prepare cream mixture: In a bowl, whisk together heavy cream, salt, black pepper, garlic powder, onion powder, and dried thyme.
4. Layer potatoes: In a 9×13-inch baking dish, arrange a layer of potatoes, overlapping slightly. Pour 1/3 of the cream mixture over the potatoes. Sprinkle with 1/3 of the Gruyère and Parmesan cheeses. Repeat with two more layers.
5. Bake: Cover the baking dish with aluminum foil and bake for 30 minutes. Remove foil and bake for an additional 20-25 minutes, or until potatoes are tender and golden brown.
6. Serve: Let rest for 5 minutes, then garnish with fresh parsley and serve.

Notes

• Chef tip: For a lighter version, substitute half-and-half for the heavy cream.
• Best substitution: Swiss cheese can be substituted for Gruyère.
• Make-ahead: Assemble the gratin up to 24 hours ahead. Add 10-15 minutes to the baking time.
• Scaling: This recipe can be halved or doubled depending on your needs.
• Troubleshooting: If the potatoes are still hard after baking, cover the dish with foil and bake for an additional 10-15 minutes.

Storage

• Fridge: Store leftovers in an airtight container in the fridge for up to 4 days.
• Freezer: Freeze individual portions for up to 2 months. Thaw overnight in the fridge before reheating.
• Oven reheat: Reheat in a 350°F (175°C) oven for 15-20 minutes or until heated through.
• Microwave reheat: Reheat in the microwave for 1-2 minutes or until heated through. Add a splash of milk to prevent drying out.
• Make ahead: Assemble the gratin up to 24 hours ahead. Add 10-15 minutes to the baking time.

Nutrition Per Serving

• Calories: 380
• Protein: 12g
• Fat: 25g
• Carbs: 35g
• Fiber: 4g
• Sugar: 3g
• Sodium: 500mg
• Cholesterol: 95mg
• Sat. Fat: 15g

Nutritional values are estimates only. Actual values may vary by brand and portion size.

Creamy Potato Gratin for Easy Dinner Sides FAQs

A Warm Final Note

I can’t wait for you to try Creamy Potato Gratin for Easy Dinner Sides and see how effortlessly it comes together. When you make it, pop back here and leave a rating or share how it turned out — I love hearing from you!