A Buttery-Oatmeal crust topped with chocolate and a creamy peanut butter frosting.
Preheat oven to 350. Combine flour, oatmeal, salt, and baking soda in a medium bowl. Set aside. Combine butter and sugars in a large mixing bowl. Beat until smooth. Add in egg, peanut butter, and vanilla. Add in the dry ingredients and mix until just combined. Spread mixture evenly into the bottom of a greased 9x13 pan. Bake the crust in the oven for 20 minutes. Remove. Sprinkle the entire bag of chocolate chips over the crust. Return to the oven and bake for 1 minute. Remove from the oven. Use an icing spatula to spread the melted chocolate chips evenly over the crust. Allow to cool completely.
Combine Peanut butter and butter in a large mixing bowl. Beat until whipped consistency. Add in powdered sugar and half and half. Beat until well combined.
Spread the frosting evenly over the top of the bars. Sprinkle the nuts and chocolate chips over the frosting. Cut bars into squares and serve. Store remaining bars in an air-tight container.