Preheat oven to 350 F

1. Sift the flour and mix it well with the baking powder. 
2. Put it in a bowl.
3. At the center, make a pit . Add the yolks, sugar, vanilla and the melted butter. 
4. Knead all ingredients, adding some milk until mixture becomes a soft dough. 
5. Leave it for 10 minutes and then cut it into pieces. 
6. Roll every piece to 3/8 inch thickness, then cut with a small round cutter into biscuits.
7. Place biscuits on a large baking pan. 
8. Brush them with an egg white bath.
9. Place at the center of each biscuit a half almond and bake them for 15 minutes. 
10. Take them out, leave them to cool and spread marmalade on them.