In a large bowl, cream together butter, brown sugar, and white sugar. Add peanut butter and mix until smooth. Beat in the eggs and vanilla extract.
Mix in dry ingredients. Add the Rice Krispies cereal and mix by hand.
Line baking sheets with parchment paper.
Scoop cookies using a SMALL cookie scoop (1 Tablespoon-sized) onto the baking sheets.
Bake cookies for 9-10 minutes. Allow cookies to cook on the cookie sheet for at least 5 minutes before transferring to a cooling rack.
Allow the cookies to cool completely.
Melt chocolate chips and butterscotch chips in a double boiler or microwave. I usually use my microwave and heat the chocolate chips and butterscotch chips for 30 seconds, then I stir and heat them for an additional 15-20 seconds. Every microwave is different, my advice is to go low and slow. Short intervals, stirring until smooth and creamy. DO NOT OVERHEAT CHOCOLATE.
Spoon a small amount of melted chocolate and butterscotch onto each cookie. Spread.
Chill cookies until set.
Video
Notes
Cover cookie sheets with plastic or store cookies in an airtight container to keep them fresh for up to 3-5 days.