Directions
Peel the potatoes, then quarter and thinly slice them. Put them in a bowl and cover with cold water to keep them from oxidizing.
Heat the olive oil to 200°F in a medium pot. Drain and dry the potatoes with a paper towel. Add potatoes to the pot and cook, stirring occasionally, until soft and easily pierced with a knife but not browned, about 25 minutes. Using a slotted spoon, transfer the potatoes to a paper-towel-lined tray to drain. Reserve the cooking oil in the pot over low heat.
Meanwhile, after the potatoes have cooked for 10 minutes, carefully spoon about 1/2 cup of the hot oil from the pot into a small sauté pan and heat over medium-low. Add the onions and cook, stirring often, until soft and golden brown, about 15 minutes. Be careful not to let the onions burn. Transfer them to a paper-towel-lined plate to drain.
Whisk the eggs, egg yolks, and kosher salt together in a mixing bowl. Fold in the warm potatoes and onions with a spatula and mix until well combined and the eggs and potatoes start to become creamy. You want to break up the potatoes and create a creamy mixture, but be careful not to turn them into mashed potatoes.
Heat 1 tablespoon of the reserved oil in an 8- to 9-inch nonstick sauté pan over medium heat. When the oil begins to slightly smoke, add the egg and potato mixture to the pan and remove it from the heat. Shake the pan in a circular motion for about 15 seconds to spread out the mixture evenly in the pan and to keep the egg from sticking. Reduce the heat to low and return the pan to the heat. Let the tortilla cook for 3 to 4 minutes, until the edges start to set but the center is still loose and runny.
Place a 10-inch plate over the pan, flip the pan and plate over, and shake the tortilla onto the plate. Return the pan to the heat, add 1 more tablespoon of the reserved cooking oil, heat until the oil just begins to smoke, then slide the tortilla, runny side down, into the pan. Swirl the pan for 10 seconds, and let the tortilla cook for 45 seconds to 1 minute until its edges have set.
Slide the tortilla onto a serving plate and let rest for a few minutes. The tortilla should be soft and runny on the inside, but firm and golden yellow on the outside. Season to taste with flaky sea salt and cut into wedges to serve.
From Spain My Way: Eat, Drink, and Cook Like a Spaniard by José Andrés with Sam Chapple-Sokol. Copyright © 2026 by José Andrés. Excerpted by permission of Ecco, an imprint of HarperCollins Publishers.
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