Because we are using nut butter, maple syrup and the chilled coconut milk as our replacement for the marshmallows, you can heat this mixture up in the microwave to help loosen the nut butter. You just need to watch it closely to make sure you aren't burning your mixture. I would microwave the churro mixture in 30 second intervals until it's all very easy to stir together, then fold in your rice crispy cereal.