In a large pot, melt 1/2 cup of butter over medium heat.
Turn the heat to low and stir in 10 oz. of marshmallows. Stir with a rubber spatula until the marshmallows are smooth. Optional: add in a squirt of orange gel food coloring and stir until the mixture is evenly colored. If you don't have gel food coloring, use 2 tsp of liquid food coloring.
Next, mix in 1 1/2 tsp pumpkin pie spice, 1 tsp vanilla, and 1/4 tsp fine salt.
Remove the pot from the stove and stir in 6 cups of puffed rice cereal in two additions. Stir until the cereal is fully coated.
If desired, mix in 1 cup of mini marshmallows at this stage. This will give these pumpkin spice rice krispies an added bit of texture and an awesome look when you cut in.
Quickly scoop the mixture into the prepared pan. Use a rubber spatula to gently press the mixture into an even layer.
Let the rice krispies cool for 15 minutes, then drizzle with cream cheese frosting if desired (use 1/4 batch of this recipe). Cut into 16 squares and enjoy!
If you top these with cream cheese frosting, store them in the fridge in an airtight container for up to 5 days. Unfrosted rice krispies can sit at room temperature for up to 5 days in an airtight container.
Notes
Making Thinner Pumpkin Rice Krispie Treats
If you want to make thinner treats use a rectangular 13x9" cake pan. This will give you around 32 1x2" treats.
Tips for Making the Best Pumpkin Rice Krispie Treats
Prepare your pan before you melt your butter! Things will get sticky quickly.
Add in the rice krispies in two additions to make it easier to mix together.
Although it is optional- I recommend drizzling the top of the treats with some cream cheese frosting for some added richness. Use this recipe!
Let your treats cool for at least 15 minutes before cutting and serving.
Rice Krispie Variations
There are so many ways to make these pumpkin spice rice krispie treats your own! Here are a few ideas:
Add food coloring for different holidays! I recommend adding this to your melted marshmallow mixture before you add in the cereal.
Mix in different candies or cookie crumbs.
Brown your butter to add nutty-caramel notes to the treats.
Making These Pumpkin Spice Rice Krispie Treats in Advance & Storage Tips
You can make these treats in advance! Unfrosted rice krispie treats can sit at room temperature for up to 5 days if stored in an airtight container. You can also freeze them in an airtight container for up to six weeks.Frosted rice krispie treats should be stored in the fridge in an airtight container for up to 5 days.