1. In a medium bowl whisk together flour, baking powder, baking soda and salt; Set aside
2. In a mixing bowl, using an electric mixer at medium speed, cream together peanut butter, butter, and both sugars until light & fluffy.
3. Add egg & vanilla to butter mixture & blend well.
4. Stir in flour mixture
5. Shape dough into 3 rolls to fit into cookie gun; cover and chill for at least 1 hour
6. Preheat oven to 350 F
7. Use cookie gun to shape dough as desired, following manufacturer's instructions. Place on ungreased baking sheet about 2 inches apart.
8. Bake for 8 to 10 minutes or until lightly browned. Transfer to wire racks to cool completely.
