2400 million cookies (pâte sablée)

Preheat oven to 190ºC.

Sift flour and icing sugar and combine them with a dough mixer. Add butter dices with a spatula, stirring at the same time. Pour the yolk and mix until everything is well-combined and you have a soft dough.

Flour your work surface and flatten the dough with a rolling pin for a three mm thickness.

Cut the sablée dough into your wafer banknotes notes.

Place the cookies on an oven tray with parchment paper.

Bake for 15 minutes at 170ºC. Remove from the oven and cool for 10 minutes.

Melt a bit of butter and spread it with a paintbrush on every cookie to stick the wafer banknotes over them.