The Food Lab: How to Roast the Best Potatoes of Your Life
The Food Lab: How to Roast the Best Potatoes of Your Life is a medium American recipe that serves 6. 210 calories per serving. Recipe by J. Kenji López-Alt on YouTube.
Prep: 14 min | Cook: 1 hr 5 min | Total: 1 hr 34 min
Cost: $5.06 total, $0.84 per serving
Ingredients
- 4 lb Russet or Yukon Gold Potatoes (cut into large chunks; skins left on for texture)
- 1 oz Kosher Salt (≈2 tbsp; adds flavor and helps draw moisture)
- 0.5 tsp Baking Soda (creates alkaline water to break down pectin for extra crunch)
- 5 tbsp Extra Virgin Olive Oil (for garlic‑rosemary infusion)
- 2 tbsp Fresh Rosemary (handful, chopped; stems removed)
- 3 cloves Garlic (minced or pressed)
- 2 tbsp Fresh Parsley (chopped, for finishing)
- to taste Freshly Cracked Black Pepper (season potatoes before roasting)
Instructions
Boil Potatoes in Alkaline Water
Fill a large pot with 2 quarts of water, add 1 oz salt and ½ tsp baking soda. Bring to a rolling boil, then add the 4 lb of potato chunks. Boil until a knife easily pierces and the exterior starts to fall apart, about 10 minutes.
Time: PT10M
Temperature: Boiling
Make Garlic‑Rosemary Infused Oil
While the potatoes boil, heat 5 tbsp extra‑virgin olive oil in a skillet over medium heat. Add the chopped rosemary and minced garlic, season with a pinch of salt and pepper, and cook until the garlic just begins to turn golden, about 5 minutes. Immediately strain the oil into a large bowl, discarding the solids.
Time: PT5M
Temperature: Medium
Drain and Dry Potatoes
Drain the boiled potatoes in a colander and let them sit for 2 minutes to steam off excess moisture. Do not rinse; the starch left on the surface aids crisping.
Time: PT2M
Rough Toss with Oil
Transfer the hot potatoes to the bowl containing the strained garlic‑rosemary oil. Add a pinch of salt and freshly cracked black pepper. Using a fork or your hands, gently rough‑toss, crushing some edges to create a fluffy, mashed‑potato‑like coating.
Time: PT3M
Preheat Oven and Arrange
Preheat the oven to 450 °F (or 400 °F if using convection). Line a rimmed baking sheet with parchment or a silicone mat. Spread the potatoes in a single layer with a little space between each piece.
Time: PT10M
Temperature: 450°F
Initial Roast
Place the baking sheet in the oven and roast undisturbed for 20 minutes so the crust can set.
Time: PT20M
Temperature: 450°F
Flip and Finish Roast
After 20 minutes, flip each piece with a spatula or tongs. Continue roasting, tossing occasionally, until the potatoes are deeply browned and crisp all over, about 30–40 minutes more.
Time: PT35M
Temperature: 450°F
Finish with Parsley
Transfer the roasted potatoes to a serving bowl. Add any remaining garlic‑rosemary oil and the chopped parsley. Toss to coat evenly and serve immediately.
Time: PT2M
Nutrition Facts
- Calories
- 210
- Protein
- 3 g
- Carbohydrates
- 45 g
- Fat
- 5 g
- Fiber
- 4 g
Dietary info: Vegetarian, Vegan, Gluten-Free
Allergens: None
Last updated: April 18, 2026








