Spanish Potato & Onion Tortilla
The classic Spanish Tortilla Española is a simple yet incredibly flavorful dish made with just a few humble ingredients. This traditional recipe delivers a rich, creamy texture on the inside with a perfectly cooked exterior—making it one of Spain’s most beloved comfort foods.
Ingredients (Serves 4)
- 5–6 potatoes (about 800 g), peeled and thinly sliced
- 1 large onion, finely sliced
- 6 eggs
- 150 ml olive oil
- Salt to taste
Step-by-Step Preparation (Traditional Method)
1. Prepare the Potatoes and Onion
Start by peeling the potatoes and slicing them into thin rounds. Thin slices ensure even cooking and a soft, melt-in-your-mouth texture.
Slice the onion finely so it blends seamlessly into the tortilla, adding natural sweetness and depth of flavor.
2. Gentle Cooking (The Secret to Authentic Flavor)
Heat the olive oil in a large pan over medium heat.
Add the potatoes and onions and cook slowly for 15–20 minutes.
Important Tip:
Do not brown or crisp them. The goal is to gently soften them so they become tender and silky, which is what gives the tortilla its signature creamy texture.
Benefit: Slow cooking enhances flavor while preserving a soft, delicate texture.
3. Drain Properly
Remove the potatoes and onions from the pan and let them drain well.
Keep a small amount of oil for cooking the tortilla later.
Tip: Proper draining prevents the tortilla from becoming greasy while still keeping it moist.
4. Mix with Eggs
In a bowl, beat the eggs with a pinch of salt.
Add the warm (not hot) potatoes and onions to the eggs.
Let the mixture rest for 5–10 minutes.
This allows the potatoes to absorb the egg mixture.
Benefit:
This resting step creates a creamy, cohesive texture, giving the tortilla its rich and slightly custardy interior.
5. Cook the Tortilla
Heat a small amount of oil in a non-stick or well-seasoned pan.
Pour in the mixture and spread it evenly.
Cook over medium heat for 5–7 minutes.
The bottom should be set and lightly golden.
6. Flip the Tortilla (The Key Technique)
Place a plate over the pan and carefully flip the tortilla.
Slide it back into the pan and cook for another 4–5 minutes.
Adjust cooking time depending on your preferred doneness.
Important Cooking Tips
- Control the heat carefully
Too high → burnt outside, raw inside
Too low → uneven texture - Texture preference
- Slightly creamy inside = traditional Spanish style
- Fully cooked through = firmer version
- Pan size matters
A 20–24 cm pan creates a thicker, softer, and more authentic tortilla.
How to Serve
Spanish tortilla is incredibly versatile and can be enjoyed:
- Warm
- At room temperature
- Cold (very common in Spain)
Perfect as:
- Tapas
- Sandwich filling (bocadillo)
- Quick lunch or dinner
Popular Variations
- Without onion (a classic debate in Spain!)
- With chorizo for a smoky, savory twist
- With bell peppers for added sweetness and color
Authenticity Note
Traditional Spanish Tortilla Española contains only:
- Potatoes
- Eggs
- Olive oil
- Salt
Onion is optional, but widely loved for added flavor.
Benefits of This Recipe
- Made with simple, affordable ingredients
- Naturally gluten-free
- Rich in protein from eggs
- Filling and satisfying
- Perfect for meal prep and leftovers
- Can be enjoyed at any time of day