Beat soft butter with sugar, egg and vanilla seeds.
Add flour and peanuts, combine weel.
Dough will be very soft, store in fridge for 30 minutes then scoop, on a baking tray lined with baking sheet, small balls of dough.
Bake at 370°F untill gold.
Out of the oven cookies will be very soft, let them cool.
When cooled biscuits will be very crumbly, they will be tougher after a day or two.