Cream sugar, butter, and peanut butter together until smooth.Add eggs, vanilla, and baking soda and mix well.Stir in oats until well combined.Fold in chocolate chips.Spread mixture into a cookie sheet lined by parchment paper.Bake in a 350° oven for 18-20 minutes or until lightly browned.Makes 24-36 cookie bars, depending on how large you cut them.