# Potatoes Au Gratin

Cheesy potatoes au gratin are a dreamy and creamy side dish for the holidays.

- Cuisine: French
- Category: Side
- Language: en

## Ingredients

- 3 lb Yukon Gold Potatoes, peeled and sliced in 1/8” (3 mm) rounds
- 5 Cups Whole Milk
- 1 tsp Kosher Salt
- 4 Tbsp Butter
- 1 Medium Yellow Onion, diced small
- 3 Cloves Garlic, finely chopped
- 0.25 Cup All Purpose Flour
- Reserved Whole Milk
- 0.75 tsp Freshly Ground Pepper
- 0.75 tsp Kosher Salt
- 7 oz Gruyere Cheese, shredded
- 1 Cup Grated Parmesan, preferably Parmigiano Reggiano
- 1 Tbsp Fresh Parsley, finely chopped

## Instructions

1. Place the sliced potatoes in a large pot and add the whole milk and 1 tsp kosher salt.
2. Mix and bring to a simmer over high heat.
3. Once the milk starts bubbling (8-10 mins), turn the heat down to low and simmer for 5 mins, stirring occasionally.
4. Remove the potatoes from the milk with a slotted spoon and let cool and reserve the milk for the sauce and clean out the pot.
5. Preheat the oven to 375F.
6. Return the pot to the stove over medium heat, melt the butter and then add the onions with a sprinkle of salt and pepper and cook the onions while stirring for 3-5 mins until they are starting to become translucent, then add the garlic and flour.
7. Cook the garlic and flour for 1 min, stirring constantly, then start gradually adding the whole milk 1/2 cup at a time, stirring so that all the milk gets fully incorporated before adding more.
8. Once all of the milk is mixed in, add 3/4 tsp kosher salt and 3/4 tsp pepper and bring to a simmer over medium high heat.
9. Once the white sauce begins to bubble and thickens slightly (3-4 min), turn off the heat. Taste and adjust seasoning if desired.
10. Add a layer of sauce to a 9x13” (or similar) baking dish, followed by a layer of potatoes, a generous sprinkle of gruyere, and a generous sprinkle of parmesan.
11. Repeat 2-3 more times until all potatoes are used, ending in white sauce and cheese on top.

## Equipment

- large pot
- slotted spoon
- stove
- baking dish
- oven

## Tips

- Simmering the potatoes in whole milk infuses them with rich, creamy flavor and ensures they bake up perfectly tender.

## Source

- Original video: https://www.instagram.com/reel/DCpQ6EFvGMT/?igsh=MW1ueHkxYXFyM3prbQ==
- Recipe page: https://www.cliprecipe.com/recipe/1d8399f8-c67e-4159-ab92-94b38b7dcd02
- Extracted: 2025-05-08

Extracted from the video by Clip Recipe (https://www.cliprecipe.com). Quantities and steps are as stated or shown in the video. Site guide for agents: https://www.cliprecipe.com/llms.txt