Japanese Egg Sandwich / Tamago Sando
Japanese Egg Sandwich / Tamago Sando is a easy Japanese recipe that serves 2. 350 calories per serving. Recipe by Genius Eats on YouTube.
Prep: 13 min | Cook: 10 min | Total: 28 min
Cost: $6.58 total, $3.29 per serving
Ingredients
- 4 pieces Large Eggs (organic, boiled)
- 1 liter Water (for boiling eggs, organic if possible)
- 1 liter Ice Water (for shocking boiled eggs)
- 2 large Egg White (separated from boiled eggs)
- 2 stalks Spring Onion (white and green parts, finely chopped)
- 1 tablespoon Fresh Chives (finely chopped)
- 2 tablespoons Mayonnaise (Japanese Kewpie mayo preferred)
- 1 teaspoon French Mustard (Dijon works as a substitute)
- 4 slices Soft White Bread (Japanese milk bread or any soft sandwich bread)
Instructions
Boil Eggs
Place the eggs in a saucepan, cover with organic water, bring to a boil, then reduce to a gentle simmer for 6‑7 minutes for a jammy yolk.
Time: PT10M
Temperature: 100°C
Ice Bath
Using a slotted spoon, transfer the boiled eggs to a bowl of ice water and let sit for 3‑5 minutes to stop cooking and make peeling easier.
Time: PT5M
Temperature: 0°C
Peel and Separate
Peel the eggs, slice each lengthwise, and place the yolks in a mixing bowl while reserving the whites for the salad.
Time: PT3M
Make Egg Salad
Mash the yolks with a fork, then add the egg whites, chopped spring onion, chives, mayonnaise and French mustard. Mix until smooth and creamy.
Time: PT5M
Assemble Sandwich
Spread the egg salad evenly on two slices of soft white bread, layer the sliced boiled eggs on top, and cover with the remaining bread slices.
Time: PT3M
Slice and Serve
Cut the sandwich diagonally in half and serve immediately.
Time: PT2M
Nutrition Facts
- Calories
- 350
- Protein
- 12g
- Carbohydrates
- 30g
- Fat
- 18g
- Fiber
- 1g
Dietary info: Vegetarian, Contains gluten
Allergens: Eggs, Wheat, Mustard
Ingredient Substitutions
- Instead of Large Eggs: Free-range eggs
- Instead of Water: Filtered water
- Instead of Spring Onion: Scallions
- Instead of Mayonnaise: Regular mayo
- Instead of French Mustard: Dijon mustard
- Instead of Soft White Bread: Whole wheat sandwich bread
Equipment Needed
- Saucepan
- Mixing Bowl
- Fork
- Knife
- Cutting Board
- Spatula
- Plate (optional)
Critical Steps — Do Not Skip
- Boiling eggs to the correct jammy consistency
- Mashing yolks to a smooth, lump‑free texture
- Cooling eggs quickly to stop cooking and ease peeling
Chef Tips from the Video
- For ultra‑soft bread, lightly toast the slices for 10 seconds on each side before assembling.
- A pinch of sugar in the mayo adds a subtle sweetness that mimics traditional Japanese tamago sando.
Troubleshooting
Egg yolks are too dry or crumbly.
Add a little extra mayonnaise or a splash of the egg white to re‑moisten the mixture.
Bread becomes soggy quickly.
Pat the sliced boiled eggs dry with a paper towel before adding them, and serve the sandwich shortly after assembly.
Eggs are over‑cooked and green‑tinged.
Reduce simmer time to 6‑7 minutes and shock in ice water immediately.
Storage
Refrigerator: Wrap tightly in plastic wrap; keep for up to 1 day.
Freezer: Not recommended – bread becomes soggy.
Room temperature: Can sit at room temperature for up to 2 hours.
Make-Ahead Tips
- Egg salad can be prepared up to 24 hours ahead and stored in the fridge.
- Boiled eggs can be peeled and kept in a container of water in the refrigerator.
Frequently Asked Questions
What is the cultural significance and history of Japanese Egg Sandwich (Tamago Sando) in Japanese cuisine?
Tamago sando originated in Japanese school cafeterias and convenience stores as a simple, protein‑rich snack. Its soft, fluffy bread and creamy egg filling reflect Japan’s love for subtle, comforting flavors and have become a beloved staple in bento boxes.
What are the traditional regional variations of Tamago Sando in Japan?
While the classic version uses plain white milk bread, some regions add a touch of soy sauce, mirin, or curry powder to the egg mixture. In Osaka, a sweeter mayo is common, whereas in Tokyo the focus is on a clean, buttery flavor.
How is Tamago Sando traditionally served in Japan?
It is typically served as a handheld snack, cut diagonally, and eaten at room temperature. It often appears in school lunchboxes, convenience‑store grab‑and‑go meals, and as part of a larger bento.
On what occasions is Tamago Sando traditionally enjoyed in Japanese culture?
Tamago sando is popular for quick lunches, picnics, and as a comforting snack during study sessions. It is also a common offering at family picnics and school events.
What authentic ingredients are essential for a traditional Japanese Tamago Sando versus acceptable substitutes?
Authentic ingredients include Japanese milk bread, Kewpie mayonnaise, and a hint of French (Dijon) mustard. Substitutes can be regular white sandwich bread, regular mayo, or any mild mustard, though flavor will vary slightly.
What other Japanese dishes pair well with Tamago Sando?
Tamago sando pairs nicely with miso soup, pickled vegetables (tsukemono), and a side of onigiri. A cold green tea or a light fruit salad also complements the sandwich.
What are the most common mistakes to avoid when making Japanese Egg Sandwich (Tamago Sando) at home?
Common errors include over‑cooking the eggs, which makes the yolk dry, and over‑mixing the egg salad, which can become gummy. Also, using stale bread leads to a soggy sandwich.
Why does this Tamago Sando recipe use French mustard instead of Japanese mustard?
French (Dijon) mustard adds a subtle sharpness that balances the richness of the mayo and egg without overwhelming the delicate flavor, a characteristic of many Japanese sandwich recipes.
Can I make Tamago Sando ahead of time and how should I store it?
Yes, prepare the egg salad up to 24 hours ahead and keep it refrigerated. Assemble the sandwich just before serving or wrap it tightly and store in the fridge for up to one day.
What does the YouTube channel Genius Eats specialize in?
The YouTube channel Genius Eats focuses on quick, approachable recipes from around the world, emphasizing clear step‑by‑step visuals and tips that help home cooks achieve restaurant‑quality results.
How does the YouTube channel Genius Eats' approach to Japanese cooking differ from other Japanese cooking channels?
Genius Eats blends traditional Japanese techniques with modern, time‑saving shortcuts, presenting classic dishes like Tamago Sando in a concise format that highlights essential details without lengthy cultural exposition.
Last updated: August 25, 2026
