Herneküpsised (split pea biscuits)

Instructions

1. Blitz the split peas in a blender until you have a fine powder, stopping before it becomes pasty.
2. In a bowl, work the softened butter and sugar with a spatula until creamy.
3. Add the egg and mix well, then stir in the pea powder.
4. Mix the flour, baking powder, salt and vanilla, then add them to the mixture to form a smooth dough.
5. Shape into a ball, wrap it in cling film and chill for 30 minutes.
6. Preheat the oven to 180 °C. Roll the dough out to 5 mm thick and cut out rounds with a cutter or a glass.
7. Place the biscuits on a lined tray, sprinkle with almonds if using, and bake for 10 to 12 minutes, until golden around the edges.
8. Let them cool completely on a rack before handling, as they become crumbly as they cool.