I came up with my own version of s'mores bars that might work here.

S'MORES BARS

1 (16 oz) bag mini marshmallows
1 stick of margarine
1 regular sized bag graham-type cereal
1/2 cup chocolate chips (plus a few more for the top)

Remove 1 cup of marshmallows from the bag; set aside.

Melt the margarine and remaining mini marshmallows together in the microwave, stirring every minute or so until smooth.

Stir in graham-type cereal. Mix in chocolate chips and dump this all into a greased baking pan. Once everything is smoothed and even I evenly apply the remaining marshmallows to the top and sprinkle a few more chocolate chips on top.

The finishing touch on these is a few minutes under the broiler (please watch carefully as they will burn very quickly) to get a a nice golden color on the marshmallows on top.