Prepare a 9 X 13-inch baking dish by spraying it with cooking spray.
Place all of the circus cookies into a food processor and pulse 3 - 4 times until cookies are in both crumbs and small pieces. Reserve 1/2 cup of the cookie pieces to sprinkle on top.
In a large pot, melt the butter and marshmallows over low heat, stirring often.
Remove from heat. Add the Rice Krispies, crumbled cookies and 1 tablespoon of the nonpareils to the pot. Mix until well combined. Sprinkle in 1 tablespoon of the nonpareils and mix again.
Place the mixture into the prepared baking dish and evenly spread into the pan with a rubber spatula.
Sprinkle the remaining crumbled cookies on top.
In two small bowls, place 1/4 cup of white chocolate chips. Microwave for 30 seconds. Stir until chips are melted and chocolate is smooth and creamy.
Place the contents of one bowl into a zipper top sandwich bag. Cut a small piece off one of the corners and drizzle over the top of the Rice Krispie treats.
Put in a very tiny amount red food coloring into the other bowl of melted white chocolate and stir. Add more food coloring until desired hue of pink is achieved. Do not add too much at first (as I did) because it will turn red and there's no turning back at that point. If you find that the chocolate is becoming too thick to stir, add 1/2 teaspoon of the heavy cream and stir until smooth. You will not need to reheat.
Place the pink chocolate into a zipper top bag, cut of a small corner and drizzle in opposite direction of the white chocolate.