Spanish Tortilla Recipe (Tortilla Española)

Every Spanish kitchen has a tortilla in it somewhere. In the fridge under a plate, on the counter going slowly to room temperature, wrapped in foil in a rucksack on the way to the beach. It's the thing my grandmother made when there was "nothing in the house", and the thing my mother still makes when twelve people turn up unannounced. Three ingredients, if you don't count the salt, and somehow it carries a whole country's idea of comfort.

Ask any two Spaniards how to make it properly, though, and you'll start an argument. With onion or without? Loose in the middle or set all the way through? High heat or low and slow? I'll tell you how I make mine, the way I learned it standing on a stool in Andalucía, and I'll be honest about where the real cooks disagree. That disagreement is half the fun.

What a tortilla española actually is

Let's clear up the name, because it trips people up outside Spain all the time. A "tortilla" here isn't the flatbread you'd wrap a taco in. It's an omelette. The tortilla española is specifically the thick potato omelette: potatoes and eggs (and onion, if you're sensible), cooked gently in a generous amount of olive oil, set in a pan and flipped so both sides take on a pale-gold skin. You cut it into wedges like a cake and eat it warm, cold, or, best of all, at room temperature.

It isn't a quick dish if you do it right, but it isn't hard either. The whole thing lives or dies on two things: how you cook the potatoes, and your nerve when it comes to the flip.

The onion debate: con cebolla vs sin cebolla

This is the great Spanish kitchen war, and it's fought entirely without irony. Con cebolla (with onion) or sin cebolla (without). People have strong, almost familial loyalties here, usually inherited straight from whichever grandmother taught them.

I'm firmly in the onion camp, and I'll argue it with anyone. Onion, cooked down slow and sweet alongside the potato, gives the tortilla a gentle moisture and a depth the plain version simply doesn't have. It's the difference between a good tortilla and one that makes a guest go quiet for a second. The sin cebolla purists say the onion muddies the clean potato-and-egg flavour and leaves the tortilla too wet to set properly. They're not wrong about the wetness, because onion does release water, but that's a technique problem, not a reason to leave it out. Cook the onion down properly and it's a non-issue.

Do as you like. But if you've only ever had it one way, try the other before you pick your side for life.

Jugosa vs cuajada: how runny is right?

The second argument is about the centre. A tortilla jugosa is loose and almost custardy in the middle; when you cut it, the centre slumps a little and glistens. A tortilla cuajada (or bien cuajada) is fully set through, firm and cleanly sliceable. The runny camp had a huge moment when Madrid's Casa Dani made its barely-set version into a pilgrimage dish, and now half the country argues that anything firmer is overcooked.

My honest view falls somewhere in between. I like the centre soft and moist, properly jugosa, but actually cooked, not raw egg pretending to be sauce. A good tortilla should hold its shape when you cut a wedge yet still feel tender and a touch creamy inside. You control all of this with how long you leave it in the pan after the flip. More on that below.

Why the olive oil matters more than you think

People skimp here and it's a mistake. The potatoes aren't fried in the aggressive, crispy sense. They're confitadas, cooked slowly submerged in warm oil until they're soft and yielding, almost falling apart. That oil isn't just a cooking medium; it flavours everything. Use a flat, characterless oil and your tortilla tastes flat. Use a proper Spanish extra virgin and you get a fruity, green, faintly peppery backbone running right through it.

This is the one place I won't compromise. A good Andalusian olive oil, the kind pressed from picual or hojiblanca olives, gives the tortilla its soul. If you want to taste the difference yourself, our Spanish olive oil is exactly the sort I keep by the hob, and the Andalusian Olive Grove selection is a lovely way to find the one you like best. Yes, you use a fair amount, but you drain most of it back off and keep it for the next batch (or for dressing tomorrow's tomatoes). Nothing is wasted.

Ingredients

• 800g floury or all-purpose potatoes (about 4 medium), peeled
• 1 large onion (optional, but I'd use it)
• 6 large eggs
• 250–300ml Spanish extra virgin olive oil, for confiting
• Sea salt, to taste

That's it. No milk, no flour, no baking powder, no cheese. If anyone tells you to add milk, smile politely and ignore them.

Method

1. Slice the potatoes. Cut the peeled potatoes into thin, irregular slices, roughly 3mm, broken up a little. They don't need to be neat; uneven pieces actually give a nicer texture. Slice the onion thinly too, if using.
2. Confit, don't fry. Heat the olive oil in a deep frying pan over medium-low heat. Add the potatoes (and onion) with a good pinch of salt. The oil should come up around them so they bubble gently rather than crisp. Cook for 20–25 minutes, turning occasionally, until the potatoes are completely soft and break under a spoon. Tender and barely golden, never crunchy.
3. Drain. Tip everything into a sieve set over a bowl to catch the oil (save it). Let the potatoes drain and cool for a few minutes so they don't scramble the eggs.
4. Beat the eggs. Crack the eggs into a large bowl, add a good pinch of salt, and beat well. Tip in the warm drained potatoes and onion and fold them through. Now, and this is the bit nobody tells you, let it sit for 10 to 15 minutes. The potatoes soak up the egg and the whole mixture binds into something far more cohesive. Don't rush it.
5. Set the first side. Wipe out your pan, return about a tablespoon of the reserved oil, and set over medium-high heat until it shimmers. Pour in the mixture, then immediately turn the heat down to medium-low. Use a spatula to nudge the edges in, shaping it into a neat round. Cook for 4–5 minutes, until the bottom is set and golden and the top is still loose.
6. The flip. Take a flat plate larger than the pan. Cover the pan with it, take a breath, and in one confident motion invert the whole thing so the tortilla lands on the plate. Hesitation is your enemy here, so commit. Slide the tortilla back into the pan, runny side down now, tucking the edges under with your spatula to keep that rounded shape.
7. Finish to your liking. Cook the second side for 2–3 minutes for jugosa (soft, moist centre) or 4–5 for fully set. Give the pan a shake; the tortilla should slide freely. For a really tender result, flip it once or twice more, cooking just a minute each side.
8. Rest. Slide it onto a clean plate and leave it for at least 10 minutes, ideally longer. A tortilla eaten straight from the pan hasn't finished becoming itself. The centre settles, the flavours come together, and it firms up to exactly the right sliceability.

A few hard-won tips

• Use a smaller pan than you think. A 20–24cm non-stick pan gives you that proper tall, generous wedge. Too wide and you get a thin, sad disc.
• If the flip terrifies you, use a lid or a pan with a matching plate, and go for it over the sink the first time. Everyone's first flip is a near-disaster. You only learn by doing it.
• Salt the eggs and the potatoes separately. Eggs need more salt than you'd guess once the bland potato is folded in.
• Day-old tortilla is genuinely better. The flavours deepen overnight. I make it the evening before as often as not.

How we actually eat it

Rarely hot, for a start. The classic way is room temperature, cut into wedges, as a tapa with a glass of something cold. Stuff a thick slice into a crusty roll and you have the bocadillo de tortilla, the great Spanish lunchbox sandwich, the thing kids take to school and grown-ups take to the beach. Cut it into little squares, spear them with cocktail sticks, and it's party food. Serve a wedge with a simple tomato salad and good bread and it's a perfectly fine supper.

It travels, it keeps, it feeds a crowd for almost nothing, and it's as welcome at breakfast as at midnight. There's a reason it's the most-cooked dish in the country.

FAQ

Why is my tortilla falling apart when I flip it?

Usually because the first side wasn't set enough before you flipped, or the mixture didn't rest. Make sure the bottom is properly golden and firm before you invert it, and don't skip the 10–15 minute rest after mixing the potatoes into the egg. That resting time is what binds everything together.

Can I make a Spanish tortilla without onion?

Of course. That's the sin cebolla version, and plenty of Spaniards swear by it. It's cleaner and more purely potato-forward. I prefer it with onion for the moisture and sweetness, but both are completely authentic. Try each and decide.

How long does it keep?

Three to four days in the fridge, covered. Honestly, it's often better on day two. Bring it back to room temperature before eating; straight from the cold fridge it tastes muted and the texture turns dense.

Does the type of olive oil really make a difference?

More than almost anything else. The potatoes cook in the oil and absorb its flavour, so a good fruity Spanish extra virgin runs right through the finished tortilla. It's the single easiest upgrade you can make.

Get the oil right and the rest is just practice. If you'd like to taste what a proper Spanish extra virgin does to this dish, have a browse through our olive oil collection, or start with the Andalusian Olive Grove selection and let your tortilla tell you which one it likes best. ¡Que aproveche!