Combine in a bowl and mix together the following:

1 lb. rolled vanilla wafers or grahams
1 lb. pecans
4 tbsp. brown sugar
2 tsp. vanilla
1 c. or more raisins

Set aside. Melt 3/4 cup of butter (approximately 1 1/2 sticks), 1 pound marshmallows. Pour over the ingredients and mix together and then roll out into a loaf - thin or thick, whichever you prefer. Place in freezer about 10 minutes then take out and cut into pieces. Keep refrigerated.