Do I have to flip it? Can I finish it in the oven?
You can finish it in the oven if flipping stresses you out. Cook the tortilla on the stovetop until the edges set and the bottom is golden, then broil for 1 to 3 minutes, watching closely. Only do this if your skillet and handle are broiler-safe (many nonstick pans are not). If you are not sure, transfer the mixture to a lightly oiled oven-safe pan before broiling. You will lose the classic two-sided crust, but it is still delicious.
What potatoes are best for tortilla española?
Yukon Gold are my favorite because they go creamy without turning to mush. Russets work too, but they can break down faster, so be gentle when stirring.
How thin should I slice the potatoes?
Aim for about 1/8 inch so the slices cook evenly and turn silky. A mandoline makes this fast, but a steady knife works just fine. The key is keeping the slices similar in thickness so some do not turn to paste while others stay firm.
How do I know the potatoes are done?
They should be very tender. A slice should crush easily between your fingers or break when pressed with a spoon. If they still feel snappy or resistant, keep cooking. This is where tortillas fall apart later.
Should the center be runny?
In Spain you will see everything from very soft to fully set. For a family-friendly middle ground, aim for a center that is just barely set, like a soft scramble. If you are serving anyone who is pregnant, immunocompromised, or prefers fully cooked eggs, keep it on the heat a few minutes longer. If you want a softer center with a little more peace of mind, consider using pasteurized eggs.
Why did my tortilla fall apart?
Common culprits: potatoes not cooked enough (they should be very tender), heat too high (eggs seize before they bind), or flipping too early (top still liquid). Let it set longer, and use a plate larger than the skillet.
Can I add chorizo, peppers, or cheese?
Yes, but then we are moving into “tortilla with stuff,” which I fully support. Keep add-ins modest so the egg can still hold everything together. Cook and drain add-ins first so you do not add extra moisture.