Grease bottom of 13x9 pan with butter & line with parchment paper. Line that with a bottom layer of Club crackers.
Melt butter over medium heat in a pan. Add brown sugar, heavy cream, & graham cracker crumbs. Stir continuously. Heat mixture until boiling & then for 7 more minutes.
Pour half of cararmel mixture over Club crackers. Spread evenly over the layer before adding another layer of Club crackers. Add the other half of the caramel mixture over that & then top it with a 3rd layer of Club crackers. Place pan in the fridge to cool once done.
Add peanut butter, chocolate chips & butterscotch chips into pan & melt together until smooth. Spread this mixture on top of the Club crackers & return to fridge.
Allow to fully cool in the fridge & then an additional 2 hours before removing from pan to cut.