Preheat oven at 180C.
Cream the sugars and the butter until very light and fluffy.
Emulsify eggs into the cream, one at a time.
Add the vanilla essence and the salt.
Fold in the flours.
Use a teaspoon, drop 1 tsp of batter onto a baking sheet lined with parchment paper, 1 cm apart.
Bake for 10-13 minutes, until light brown.