Preheat oven to 375 degrees F (190 degrees C). Grease cookie sheets.
Mix together the peanut butter and unsalted butter . Blend in white sugar followed by yogurt until well combined.
Add the flour, baking powder and baking soda to the peanut butter mixture and mix until well blended.
Make small balls of the dough, flatten with palm and place on cookie sheet. Bake for 10 to 12 minutes.