Line an 8x8 or 9x9 pan with tinfoil and set aside.
Dump the mixture into the tinfoil lined pan and press evenly with the back of the spoon.
In a small saucepan, add the chocolate chips and margarine. Melt over low heat. Tammy's recipe calls for 1/4 cup of margarine. I just used the remaining 1/3 of the 1/2 cup block I started with. I also used 1 1/4 cups of chips. You could probably do this in the microwave too, if you prefer.
Spread melted chocolate over the cereal mixture and refrigerate. Once they are hardened, remove the tinfoil from the pan and cut into squares.
They are absolutely tasty and they are like Lay's. Bet you can't eat just one!
One tip I have, don't be like me and use cheap chocolate chips. Mine tasted funny. Tammy's doesn't. Can never beat the original!