My BIL gave me this recipe after he saw my kids spread pb and marshmallow fluff on bread. i would make a batch and send it off with my college kids each fall .
2 cups brown sugar
1 cup water
1 teaspoon maple extract
2 cups peanut butter
1 (16 ounces) jar marshmallow creme
Boil together the brown sugar, water and maple extract. Mix together the peanut butter and the marshmallow creme. Combine both mixtures until smooth.
(most people would know this as "church spread" from Amish cookbooks)