Mix the room temperature butter with the egg whites.
Add the salt and vanilla and mix it again.
Mix with the sifted flour, walnut flour and baking powder.
Add the tonka bean grounded and stir again.
Cool the cookie dough into the fridge for some hours, don’t panic if the batter is too sticky, the cookies will be easy to form after some hours.
Preheat the oven 356º Fahrenheit(180º Celsius).
Dust with flour your working surface and shape the cookies with a cookie cutter.
Prepare your baking tray with baking paper or a silicon mat.
Bake 356º for 15-20 minutes. When your cookies start to brown you can take them out of the oven.
Let the cookies cool , handle them with care when they are warm, and dust them with abundant confectioner’s sugar and enjoy!