Preheat oven to 350 degrees. Line two baking sheets with parchment paper or silicon baking liners.

In a large bowl mix the peanut butter with 1 cup sugar. Stir until well blended. Add the egg, baking powder and vanilla. Stir well. Pour some additional sugar in a small bowl. Take 1 tablespoon of the dough and roll in to a ball. Roll the dough ball in the sugar and place on the prepared baking sheet. Repeat with the rest of the dough.

Take a dinner fork, stick it in the sugar and gently press down each dough ball to flatten, then turn the fork 90 degrees and gently press again, making the traditional hatch markings of a peanut butter cookie.

Bake for 10 minutes. Take out of over and let them cool on the baking sheet for 5 minutes. Gently transfer the cookies to a rack to finish cooling.