Preheat oven to 350 °F and line baking sheets with parchment paper.
To a large bowl add the peanut butter, eggs, sugar, butter, vanilla extract, baking powder and salt. Using a stand mixer or electric beater mix until combined.
Slowly fold or mix in the flour until just combined.
Using your hands, roll the dough into 1" balls and place on baking sheets. Flatten slightly with the back of a fork to create the classic peanut butter cookie lines.
Bake for 12 minutes or until the cookies become golden brown. Allow them to cool for 5 minutes before removing and enjoying!