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Dinner · Part 2 of 3: Instructions

Creamy Authentic Spanish Tortilla with Four Ingredients Step-by-step instructions

A thick, golden wedge of Spanish tortilla showing a creamy, custardy interior with tender potato slices.
Prep
Cook
Total
Serves
4
Includes 10 min resting

Before you start

Before beginning, ensure all ingredients are measured and ready. Peel and thinly slice the potatoes and onions. Beat the eggs thoroughly in a large bowl, incorporating the salt until fully dissolved.

Prepare your workstation with the non-stick skillet, a slotted spoon for draining the oil, and a large plate for the final flip. Having everything organized is vital, as the cooking process requires focused attention to temperature control and timing, especially during the searing phase.

Ingredients at a glance (5)
  • 500 grams Yukon Gold potatoes, thinly sliced
  • 1 large yellow onion, thinly sliced
  • 250 milliliters extra-virgin olive oil
  • 6 large eggs, beaten
  • 6 grams fine sea salt

Instructions

Confit Potatoes and Onions

  1. Confit the Vegetables
    Heat the olive oil in a saucepan to 285°F (140°C). Add the thinly sliced potatoes and onions. Gently poach them in the oil for 18 minutes until they become fork-tender. Ensure the oil does not boil aggressively to maintain the confit texture.
    Look for Potatoes should be tender and easily pierced with a fork without falling apart.
    Tip Keep the heat low so the potatoes poach rather than fry.

The potatoes and onions should be translucent and soft, having absorbed the richness of the olive oil. The oil should remain clear and not smoky. Verify that the vegetables are tender by testing one with a fork; if there is any firmness remaining, continue poaching for an additional minute before draining.

Resting the Mixture

  1. Combine and Rest
    Drain the potatoes and onions thoroughly using a slotted spoon. Transfer them into a large mixing bowl containing the beaten eggs and salt. Fold the mixture gently and allow it to sit for 10 minutes. This resting period allows the potatoes to absorb the egg mixture for a cohesive result.
    Look for The potato and egg mixture will appear thickened after the rest period.
    Tip Gentle folding prevents the potato slices from breaking into a mash.

The mixture should look thick and cohesive. The potatoes should be fully coated in the egg and salt blend. Ensure the mixture has rested for the full ten minutes, as this allows the components to meld together and reach a stable temperature, which is essential for a successful sear in the final step.

Final Sear and Flip

  1. Sear the Tortilla
    Heat a non-stick skillet to 340°F (170°C). Pour in the egg and potato mixture. Sear for 2 minutes, then use a large plate to flip the omelette carefully. Cook the other side for 2 minutes. The center must reach 160°F (71°C) to be considered fully cooked, though it remains soft.
    Look for The edges should be set and golden brown while the center remains slightly tremulous.
    Safe temperature 160°F (71°C) internal temperature (egg dishes)
    Tip Use a plate wider than the skillet for a safe and easy flip.

The tortilla should be golden brown on both sides, with a firm outer crust and a soft, moist center. The edges should be clean and smooth. Ensure the omelette has reached the required internal temperature of 160°F (71°C) before removing it from the heat. Allow it to rest for ten minutes before slicing.

Common mistakes

A common mistake is using heat that is too high, which causes the potatoes to fry and crisp rather than poach, resulting in a greasy or overly firm texture.

Another frequent error is failing to drain the potatoes well, which adds too much excess oil to the egg mixture and prevents the omelette from setting properly.

Finally, rushing the flipping process can lead to the tortilla breaking apart; always move with confidence and ensure you are using a plate that is larger than the skillet.

How to tell it’s done

The tortilla is done when the exterior is a beautiful, deep golden brown and the edges are completely set. When gently shaken, the center should exhibit a slight, delicate wobble, indicating the desired custardy texture.

To ensure the eggs are safe to consume, the internal temperature of the center must reach 160°F (71°C). The potatoes should be tender throughout, with no resistance when pierced with a fork, and the overall structure should hold its shape when sliced into wedges.

  • Egg dishes: 160°F (71°C) in the thickest part

Coming up in Part 3: common questions

  • Can the tortilla be made in a smaller skillet?
  • Why does the tortilla stick to the pan?
  • Can olive oil be used instead of extra-virgin?

Also in Part 3: variations (Chorizo Infusion, Fresh Herb Tortilla), storage and make-ahead, and the printable recipe card.

Up next · Part 3 of 3

2 variations · storage & make-ahead · 3 answers · printable card

Tips, FAQ & printable recipe (Part 3)← Back to the ingredients (Part 1)