01 -
Melt the butter over low heat in a large pot.
02 -
Once the butter is melted, add mini marshmallows and stir until melted and smooth.
03 -
Add pumpkin puree and pumpkin pie spice to the melted marshmallow mixture, stirring until fully combined.
04 -
Remove the pot from the heat and quickly stir in the Rice Krispies cereal until all the cereal is coated.
05 -
If using, gently fold in the white chocolate chips for added sweetness.
06 -
Grease a baking dish with butter or cooking spray. Transfer the Rice Krispie mixture into the dish, pressing it down evenly with a spatula.
07 -
Let the treats cool at room temperature for about 30 minutes until set.
08 -
Once cooled, cut into squares. Top with candy corn and sprinkles for decoration, if desired.