Combine:

16-20 graham crackers, crushed
3 tbsp. melted butter
1/4 c. sugar

Heat over double boiler or in microwave until melted:

18 lg. marshmallows
1/2 c. milk

Then cool.

Whip:

1/2 pt. whipping cream
1/2 tsp. vanilla
1 (22 oz.) can cherry pie filling

Put half of crumb mixture on bottom of buttered 9 x 9 inch dish. Combine marshmallows and whipped cream. Pour half on crumbs. Spread can of pie filling, then other half of marshmallows and remainder of crumbs. Chill at least 3 hours.