Preheat the oven to 375 degrees. Line a cookie sheet with parchment paper or silpat liner.
In the bowl of a stand mixer, cream together the butter and sugars. Beat in the peanut butter, egg, and vanilla.
Stir together the salt, baking powder, baking soda, and flours. Beat into the wet ingredients.
Stir in the peanut butter chips, chocolate chips, and pretzel pieces.
Use your hands to form the dough into balls. Place on the cookie sheet, sprinkle the tops with sea salt, and bake for 8-10 minutes, or until slightly browned on top.
Recipe by the ringers at https://www.theringers.co/2014/12/chubby-hubby-cookies/