Preheat oven to 350 degrees F. Cream together the butter, 1/2 cup peanut butter and sugars until creamy. Add the eggs and vanilla. Mix until combined. In a separate bowl mix together the flour, baking soda, and salt. Add to the wet ingredients. Add chocolate chips and stir well. Place half the cookie dough to a skillet, spread remaining peanut butter to the cookie dough. Top with the rest of the cookie dough. Bake for 25-30 minutes. Serve warm with your favorite ice cream!