Boil the eggs

• Place the eggs in a saucepan, cover with cold water and bring to a boil.
• Cook for about 10 minutes, then transfer to ice water and peel.

Make the egg filling

• Press the peeled eggs through a sieve into a bowl for a fluffy texture.
• Add the mayonnaise, sugar, salt, pepper and milk and mix until creamy.

Assemble the sandwiches

• Butter the bread slices lightly.
• Spread the egg filling generously over half of the slices and close with the remaining slices.

Cut and serve

• Trim the crusts if desired and cut each sandwich in half diagonally.