Mix first 3 ingredients together, then add the peanut butter, vanilla and egg. Beat well.
Combine the flour, baking soda and salt, whisk together.
Add half of the flour mixture to the wet ingredients and mix well. Mix remaining flour mixture into batter.
Roll dough into small one inch balls and place on cookie sheet.
Flatten slightly with fork to make criss-cross pattern.
Bake in a preheated 350 degree oven till cookie is just about done - still kind of spongy - about 7 minutes.
Pull sheet from oven and place 4 or 5 chocolate chips on top of each cookie, pressing very slightly. Bake for another 2 minutes.
Tip - for just about any cookie recipe, you can add a slice of bread to the container of cookies to keep the cookies soft.