Line a 9×13 inch baking dish with parchment paper. Add the brown rice crisps to a large bowl.In a medium pot, combine the honey and coconut oil. Bring to a boil over medium heat, stirring constantly. Cook 2 minutes, then remove from the heat. Stir in the peanut butter, then add the bourbon (if using), and vanilla. Pour over the cereal. Stir well to combine. Spread the cereal out onto the prepared pan, packing it in tightly.Melt together the chocolate and butterscotch chips in the microwave. Spread the chocolate over the bars. Place in the fridge to set, then slice and enjoy! Keep in the fridge.