Prepare a 13x9 baking pan by lining it with parchment paper, or buttering.
Place butter and marshmallows in a large pot and heat on low/medium heat, stirring frequently until melted and smooth.
Remove from the heat and add in cinnamon, nutmeg, carrots and cereal. Stir until well incorporated and the cereal is evenly coated.
Pour the mixture into your prepared pan and gently press it down evenly.
Allow to cool then cut into even squares.
To make the topping:
Place butter and cream cheese in a mixing bowl and mix with an electric mixer until well incorporated. Add in vanilla and powdered sugar and continue to mix until well incorporated.
Place white chocolate chips in a microwave safe bowl and microwave in 30 second increments stirring in between until melted and smooth.
Add the melted chocolate to the cream cheese mixture and mix on low until well mixed.
Place the topping in a piping bag drizzle across the cut cereal treats individually or across the whole pan. Allow to cool before serving.
Notes
Tips:
Hard to stir. As you are stirring the rice krispies, they will become thick and harder to stir. Just do your best to coat them completely.
Thin out the chocolate. If you want to think out the melted chocolate chips, you can add a tiny bit of coconut oil to the mixture.
Leftovers: Store any leftover treats in an airtight container for 4-5 days.Freeze: Be sure to wrap them in plastic wrap and then store them in a freezer-safe container.Thaw: To unthaw them, just move them to your fridge for a few hours or overnight.