Preheat the oven to 180°C (356°F).
Mix the almonds, flour, baking powder, sugar, and salt in a bowl.
Add cold butter, cut it into small pieces, and mix by hand until crumbly.
Add milk and egg; mix until the dough comes together.
Evenly mix in the sliced almonds into the dough.
Roll the dough out to 2cm thickness and cut into desired sizes.
Place parchment paper on a baking tray and put the dough pieces on top.
Bake at 180°C (356°F) for 20–25 minutes.