1. Preheat oven to 350 degrees F (175 degrees C).
2. In a medium bowl, mix together the peanut butter, sugar, egg, baking soda, baking powder, and salt.
3. Roll the dough into 1-inch balls and place them on an ungreased cookie sheet.
4. Flatten each ball with a fork, making a criss-cross pattern.
5. Bake for 8 to 10 minutes, or until golden brown.
6. Let the cookies cool on the cookie sheet for a few minutes before transferring them to a wire rack to cool completely.
Enjoy!
