Mix together peanut butter, sugar, coconut oil and egg until everything is smooth.
Add flour and baking powder and make the dough. It shouldn't be sticky and you should be able to form a nice large ball. Cover it with plastic and put in a fridge for about an hour.
Set oven at 350 F. Remove the dough from the fridge and break it down into 12 small balls. Press each with a palm of your hand to form a cookie. Place an almond, walnut or a peanut on top of each cookie.
Bake cookies for 15 to 20 minutes until they get a nice golden color. Remove from the oven and let them cool down for 10 min. Enjoy with a cup of tea! Bon Nuppetit!