Onsen tamago (hot spring egg) with a food dehydrator

Onsen tamago (hot spring egg)

Cooking the perfect onsen tamago (hot spring egg) using a food dehydrator

Yes, you can cook the perfect onsen egg easily using a food dehydrator. Why? Just like sous vide, food dehydrator is able to cook eggs at a certain constant temperature over a period of time.


Temperature & duration for cooking onsen tamago egg in a food dehydrator

Answer: 65°C (149°F) for 1 hour

Temperature in the dehydrator and duration are two most important factors in determining the result of your hot spring egg. Here is the result we get from trying out different cooking time and temperature for cooking a perfect onsen egg using a food dehydrator. The perfect onsen egg falls off easily and beautifully when breaks open, and the egg yolk in fully contained inside the spherical, smooth and silky egg white.
  • 65°C (149°F)
    • 1 hour: The perfect onsen egg
      • Occasionally, some of the protein white is undercooked.
    • 2 hour: The perfect onsen egg
      • Slightly thicker runny egg yolk, perfect for those who prefer a more cooked onsen egg.
      • The outer egg white appearance may be not so perfectly spherically smooth when cracked open, but still considered as perfect 😊.
  • 70°C (158°F)
    • 1 hour: The perfect onsen egg
      • Similar to cooking the onsen egg at 65°C for 2 hours
  • 75°C (167°F)
    • 1 hour: The egg yolk is overcooked
      • The egg yolk is a a little bit hardened and not that creamy anymore


Frequently asked questions 🙋

Will the egg explodes when cooked in a food dehydrator?

No, the egg won’t explode, crack or break when cooked inside a food dehydrator.

Should I put eggs in room temperature or or fridge into the food dehydrator?

Both are good to go, you can put either eggs in your refrigerator or at room temperature directly into your food dehydrator. The result won’t matter so much, but of course the eggs already at room temperature will be cooked slightly faster than the eggs stay in the fridge.


Discussion 💬

Feel free to leave a comment below, share with us your opinion and experience, or ask a question if you have any doubt regarding this topic. Thanks for reading.


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