Preheat oven to 350. Combine flour and soda and set aside. In a large mixing bowl cream together butter and sugars. Add in peanut butter, vanilla, and eggs. Add in dry ingredients and mix until just combined. Fold in chocolate chips. Scoop a Tablespoon of the dough and roll into a ball. Dip the ball into the sugar and press down slightly onto an ungreased cookie sheet with a fork. Bake for 15 minutes or until light golden brown. Allow to cool completely before storing in an airtight container.