01 -
Place eggs in a medium saucepan and add enough water to cover by 2.5 cm. Bring to a boil on medium heat. Once boiling, cook for 12 minutes.
02 -
Transfer the cooked eggs to iced water to stop the cooking process. Let them cool completely before peeling the shells.
03 -
Transfer the peeled eggs to a bowl and mash with a fork, ensuring the egg whites are broken into small, uniform pieces.
04 -
Add sugar, kosher salt, black pepper, and milk to the mashed eggs.
05 -
Incorporate the Japanese Kewpie mayonnaise and mix thoroughly. Taste and adjust seasoning with additional salt and pepper if needed.
06 -
Lay out the shokupan slices and spread salted butter on each slice.
07 -
Spread the egg salad on one buttered slice of bread for each sandwich. Top with the second slice, buttered side down.
08 -
Place the sandwiches between two plates to compress slightly. Let rest for 5 minutes.
09 -
Trim off the bread crusts from each sandwich.
10 -
Cut each sandwich in half diagonally and serve immediately.