Spray a 9x13 pan with non-stick spray and set aside.
In an extra large bowl, measure out the Rice Krispie Cereal. Set aside.
8 cups (216g) Rice Krispie Cereal
In a separate large microwave safe bowl, microwave the butter until completely melted.
1/3 cup (73g) salted butter
Add the bag of marshmallows to the bowl with melted butter. Stir to coat the marshmallows in the melted butter.
16 oz bag mini marshmallows
Microwave the marshmallows + butter for 1 minute, stirring at the 30 seconds mark.
Add the cake batter flavoring to the bowl and stir until well combined and smooth.
1/2 tsp cake batter flavoring
Pour the melted marshmallow mixture into the bowl with the Rice Krispie Cereal. Stir until well combined.
Fold in the colored sprinkles.
1/3 cup colorful Jimmie Sprinkles
Pour the completed mixture into the prepared 9x13 pan.
Wet your hands with water and then gently press the mixture into the pan.
Allow the treats to set, cut and serve. Enjoy!!