Japanese Egg Sandwich (Tamago Sando)

Ingredients

• 4 slicesshokupan (Japanese milk bread, also called Hokkaido bread)
• to tastebutter
• 4, peeledhard-boiled eggs
• 75 ml (5 tablespoons)Kewpie mayonnaise
• 2.5 ml (½ teaspoon)kosher salt
• 2.5 ml (½ teaspoon)yellow mustard
• to tasteground black pepper

Instructions

1. 1

   Mash the eggs

   Put the peeled hard-boiled eggs in a bowl and mash them with a fork.

2. 2

   Season the filling

   Add the mayonnaise, mustard, salt and pepper, then stir. Keep mashing until creamy but not completely smooth, leaving some pieces of egg for texture and volume.

3. 3

   Assemble the sandwiches

   Butter each slice of bread and spread the egg mixture over two slices.

4. 4

   Finish and serve

   Place the remaining bread slices on top and cut each sandwich in half.

What is tamago sando?

Tamago sando is the Japanese name for an egg sandwich, commonly made with soft, slightly sweet shokupan and a mayonnaise-based egg filling. It is a familiar style of sandwich in Japan, where the tender bread and simple filling are the main attractions.

This version keeps the eggs a little chunky rather than blending them into a paste. Kewpie mayonnaise makes the filling rich, while mustard and black pepper add a restrained savoury edge.

Nutrition and macros by portion

The nutrition label shows one serving as written: 596 calories, 18g protein, 30g carbs, 44g fat.

The bread provides most of the carbohydrates, while the eggs contribute protein and the mayonnaise and butter account for much of the fat. Serve a sandwich with fresh vegetables or salad to add a crisp, lighter contrast to the creamy filling.

Choosing the bread and mayonnaise

Shokupan: its soft, fluffy crumb suits the creamy filling and is easy to bite through. If it is unavailable, use another soft white sandwich loaf.

Kewpie mayonnaise: this Japanese-style mayonnaise gives the egg mixture its characteristic rich, savoury quality. Regular mayonnaise works as a substitute, though the flavour will differ.

Keep some texture in the eggs

Chunky filling: mash with a fork and stop when the mixture is creamy but still has visible pieces of egg. Mashing until completely smooth makes the filling denser and less varied in texture.

Even seasoning: stir the mayonnaise, mustard, salt and pepper through the eggs before assembling. Taste the filling if needed, bearing in mind that kosher salt and table salt can differ in saltiness by volume.

Butter and assemble gently

Butter: spread it over each slice before adding the filling, as directed. A thin, even layer is easier to bite through than thick patches.

Filling: divide it between two slices and spread it towards the edges without pressing hard. Add the remaining bread on top, then cut the sandwiches in half for serving.

Serve it simply

The sandwich is rich and soft, so crisp or fresh accompaniments make a useful contrast. Try it with cucumber, sliced tomatoes or a lightly dressed green salad.

For a packed lunch, keep the sandwich chilled until you are ready to eat it. It is best soon after assembly, while the bread is still soft and the filling has not had time to dampen it.

Recipe notes & tips

• Use eggs that are fully cooled before mashing so the filling stays thick.
• Mash with a fork rather than blending to preserve some pieces of egg.
• Add the salt gradually if using table salt instead of kosher salt.
• Spread the butter and filling evenly so each bite has a balanced amount.
• Cut the sandwiches with a sharp knife to help keep the filling in place.

Variations

• Add chives: Stir finely chopped chives into the egg mixture for a fresh onion note.
• Use spring onion: Mix in a small amount of finely sliced spring onion for extra savouriness.
• Add a little heat: Stir a small amount of chilli sauce into the mayonnaise before mixing.
• Try wholemeal bread: Use soft wholemeal sandwich bread if shokupan is unavailable.
• Add crisp cucumber: Layer thin cucumber slices into the sandwich just before serving.

Common mistakes to avoid

• Over-mashing the eggs: The filling can turn pasty; stop while some pieces remain.
• Using too much salt: Table salt can taste saltier by volume than kosher salt; use a little less.
• Adding warm eggs: Warm eggs can make the filling loose; let them cool before mashing.
• Overfilling the bread: Too much filling can squeeze out when cut; spread a manageable layer.
• Pressing the sandwich firmly: Heavy pressure squashes the soft bread; assemble and cut gently.

How to store

Keep assembled sandwiches covered in the refrigerator and eat them within a day for the best texture. They are best served cold or cool; warming can soften the bread and loosen the mayonnaise-based filling.

Frequently asked questions