Tortilla Española

About this dish

The Spanish omelette — tortilla española — first appears in historical records in the early nineteenth century in Navarre, though its true origins are disputed. Unlike a French omelette, it is thick and substantial, more cake than egg, built on layers of slow-cooked potatoes and onions. It is eaten at any hour of the day in Spain: as a tapa, a lunch, a sandwich filling (bocadillo de tortilla), or a midnight snack. The debate over whether to include onion — con cebolla or sin cebolla — is taken more seriously in Spain than most political questions.

• Vegetarian
• Gluten-free
• Lactose-free
• Not vegan because of Eggs

• 6largeEggs
• 600gPotatoes
• 1largeOnion
• 200mlExtra-virgin olive oil
• 1 ½tspFine sea salt

Instructions

1. 1

   Peel the potatoes and slice them thinly (about 3mm) — use a mandoline if you have one. Halve and thinly slice the onion. Season both with salt.

   10 min

   Tip: Thin, even slices cook evenly and create the layered texture that distinguishes a great tortilla from a flat omelette.

2. 2

   Heat all the olive oil in a deep 24 cm frying pan over medium heat. Add the potatoes and onion and cook gently, turning occasionally, for 20–25 minutes until completely tender but not browned. The oil should bubble gently — adjust heat if it sizzles too aggressively.

   25 min

   Tip: This is confit cooking, not frying. You are gently cooking the vegetables in oil, not crisping them. They should be completely yielding when pressed.

3. 3

   Beat the eggs in a large bowl with a good pinch of salt. Using a slotted spoon, transfer the cooked potatoes and onions to the egg bowl, letting excess oil drain back into the pan. Gently fold together and leave to rest 5 minutes.

   7 min

   Tip: The rest period lets the hot potato melt into the egg slightly, creating a cohesive mixture rather than separate pieces.

4. 4

   Pour off all but 2 tablespoons of oil from the pan and return to medium heat. Pour in the egg and potato mixture, spreading it evenly. Cook for 4–5 minutes, gently shaking the pan, until the edges are set but the centre still wobbles.

   5 min

   Tip: A well-seasoned pan or non-stick surface is essential here. If in doubt, add a splash more oil before pouring in the mixture.

5. 5

   Place a large flat plate over the pan. In one confident motion, flip the tortilla onto the plate, then slide it back into the pan uncooked-side down. Cook 3–4 more minutes. The inside should remain slightly custardy — not fully set. Slide onto a plate.

   4 min

   Tip: The flip is the moment of commitment. Do it decisively — hesitation is what causes accidents. Have the plate ready before you pick up the pan.

6. 6

   Allow to rest at least 10 minutes before cutting — the residual heat will finish setting the interior. Serve warm or at room temperature, cut into wedges. A tortilla is never served piping hot.

   10 min

   Tip: Room temperature is actually the ideal serving temperature for tortilla. The flavour is fuller and the texture is more custardy.