Heat and melt the butter in a sauce pan over low heat.

Add the marshmallows and stir constantly until the marshmallows are completed melted. Then add the yellow cake mix and whites chocolate chips and stir until melted. Remove the pan from heat.

Stir in rice krispie cereal, until it is completed coated with marshmallows. Then stir in the sprinkles.

Grease a 11×7 or 9×9 baking pan with cooking spray or line it with parchment paper. Press the cereal marshmallow mixture into the pan. Sprinkle more funfetti on top. Let it cool for 30 minutes so the treats become firm.

Cut the rice krispie treats into squares, and enjoy!