Microwave the chocolate chips, peanut butter and butter for 60 seconds, and stir until smooth
add the vanilla and stir
pour over the cereal and carefully mix until it's well covered
Get two large bags (I use small, unused, garbage sacks)
sprinkles one bag with half the powdered sugar and the other bag with half the brownie mix
divide the chocolate covered chex and pour into the bags.
sprinkle the rest of the powdered sugar and brownie mix over their bags (powdered sugar over the powedered sugar, and brownie mix over brownie mix)
Now comes the fun, shake the bags, a lot, until all the chex pieces are covered
serve and enjoy!