Classic Spanish tortilla becomes an easy keto-friendly dish using a simple substitute: daikon radish. This 3-ingredient Keto Spanish Tortilla captures the texture and flavor of the original while staying low in carbs, making it ideal for family meals or a special Father’s Day surprise.
Daikon is mild in flavor and adaptable, so you can easily personalize this tortilla with herbs, spices, or protein additions. Below you’ll find step-by-step instructions, helpful tips, nutritional info, and variation ideas to make the dish your own.
How to make this 3-ingredient Keto Spanish Tortilla
Instead of potato, this recipe uses daikon radish, which works wonderfully in place of potatoes in many keto recipes. I’ve simplified the traditional Spanish tortilla method: there’s no lengthy resting period for the mixture, no caramelizing to produce excessive advanced glycation end-products (AGEs), and no risky flipping during cooking. The key is to cook the daikon until fully soft; everything else follows easily.
Ingredients for one skillet (serves about 4):
- 1 lb (450 g) daikon radish
- 1 medium yellow onion, finely chopped or sliced
- 6 free-range eggs
- About 2 oz (60 g) butter for frying
- Salt, pepper, and other seasonings to taste
Step-by-step:
1. Peel the daikon and slice it into thin rounds, about 1/6-inch (0.4 cm) or thinner.
2. Heat an 8–9 inch (20–23 cm) skillet over low heat and add a generous amount of butter (about 2 oz / 60 g). When sizzling, add the daikon slices and stir to coat.
3. Cook the daikon covered, stirring occasionally, until completely soft — about 20–30 minutes. If the daikon browns too quickly, lower the heat.
4. Add the chopped onion (frozen chopped onion works well to save time) and cook covered until translucent, about 5 minutes. Stir to combine.
5. In a small bowl, whisk the eggs and season with salt and pepper (and any other spices you like). Pour the eggs evenly over the daikon and onion in the skillet. Lower the heat to minimum and cover.
6. Cook covered until the eggs are completely set, about 20–30 minutes. Ensure the tortilla releases easily from the skillet before removing.
7. Slide or flip the tortilla onto a serving plate, let it cool until lukewarm, then slice and serve. The tortilla keeps well and is also delicious cold.
Why this method works
I experimented with boiling daikon at first, following a suggestion from a reader, but found that frying the slices in butter brings better flavor and a simpler cooking process. Frying the daikon in the skillet means you can finish the dish without transferring between pans, and the butter adds richness that enhances the otherwise mild daikon. Using six eggs balances the daikon so the tortilla holds together nicely without being egg-heavy or too sparse.
Ingredients (concise)
- 1 lb (450 g) daikon, peeled and thinly sliced
- 1 medium yellow onion, chopped
- 6 eggs, beaten and seasoned
- About 2 oz (60 g) butter
Nutrition information
| Nutrition | In total | Per serving (4 servings) |
| Protein | 46.5 g | 11.6 g |
| Fat | 79.3 g | 19.8 g |
| Net carbs | 10.2 g | 2.6 g |
| Calories | 942 kcal | 236 kcal |
Tips for variations
This is a great base recipe that welcomes many flavor profiles. Try these seasonings and add-ins to customize your tortilla:
Seasonings:
- Black pepper, smoked paprika, garlic, red pepper flakes, cayenne
- Herbs: parsley, rosemary, oregano, marjoram, bay leaf
Protein and vegetable add-ins:
- Chorizo, bacon, ham, pepperoni, sausage, chicken
- Cheese (Manchego is a classic choice), tuna, anchovies
- Spinach, bell pepper (green for lower carbs), asparagus, artichoke, broccoli, kale, leek, mushrooms, tomato slices, zucchini
- Finish with aioli or a drizzle of olive oil for extra richness
Notes from the kitchen
This recipe came from experimenting with daikon as a potato substitute. Frying the daikon in butter rather than boiling produced better flavor and texture. The tortilla held together well with six eggs and was enjoyable hot or cold. If you make larger or smaller batches, adjust egg quantity relative to daikon so the mixture binds properly.
Enjoy experimenting with this simple, satisfying keto take on a Spanish classic.