Put the almond bark, peanut butter, and butter in a big bowl that is safe for the microwave. Heat on high for one minute then stir. Continue to microwave in 15-second intervals until melted.

Add in the green food coloring and stir.

Dump in the Chex cereal and stir.  

Put one cup each in two different gallon size bags. Add 1/3 of the mixture to the bag and shake to coat the powdered sugar.

Put the rest of the cereal on a large baking sheet. Pour the sugar-coated cereal over the top of the green cereal and then mix them all together.

Let the mixture rest for at least 30 minutes to set.

Add the red and green sprinkles.