In a 3-quart saucepan over medium-high heat, bring crumbs, brown sugar, butter, milk, and sugar to a boil. Reduce heat slightly and boil 5 minutes.
Meanwhile, line the bottom of 9-inch by 13-inch pan with Club crackers. Spread the boiled sugar mixture over top of crackers. Top with another layer of Club crackers.
In a small saucepan over medium heat, melt chocolate chips, butterscotch chips, and peanut butter. Stir until smooth (do not whip). Spread evenly over crackers. Cool at least 30 minutes and cut into 28 bars.