1Cream the butter and brown sugar until fluffy. Add the eggs, vanilla, and peanut butter and cream again. Slowly add the dry ingredients until it is all mixed in. Stir in the peanuts and peanut butter chips by hand. Spread the dough into a 9x13 pan that has been sprayed with non stick spray. Bake at 350* for 24-25 minutes. Cool on a wire rack.
When the bars are completely cool, melt the chocolate chips and shortening in a microwave safe bowl. Stir every 30 seconds, so it doesn’t burn. Lay the chopped pretzels on top of the cooled bars and spread the melted chocolate on top. Let set before cutting.