Preheat oven to 350 degrees F and line a baking sheet with parchment paper.

In a small mixing bowl, whisk together the dry ingredients. Set aside.

In a medium mixing bowl, add the peanut butter, oil and sugar. With a hand mixer, beat together until creamy. Add the egg and beat until combined.

In batches, add the dry ingredients to the wet and mix until a stick dough forms. Fold in chocolate chips.

Spoon the batter on the prepared baking sheet, and smooth with the back of a metal spoon.

Bake in the center of the oven for 10 - 12 minutes, until the cookies have started to brown but are still tender to the touch.

Cool on the cookie sheet for a few minutes, then transfer to a wire rack and cool completely (or eat one now if you simply can't resist!).