Grease a 13x9 pan with butter.
In a medium to large saucepan, melt the butter over low heat.
Add the marshmallows and stir until completely melted.
Remove from heat.
Add the Rice Crispies cereal and stir until cereal is well coated.
Allow to set about 4 minutes.
Press mixture into prepared pan and allow to cool.
Combine softened cream cheese, condensed milk, lemon juice, and vanilla and beat until well blended.
Pour on top of the cooled rice krispies and allow to set in the fridge for several hours.
Top with cherry pie filling and refrigerate.
After cutting, you can drizzle with white chocolate.
Place chips in corner of zippered sandwich bag and microwave 45 seconds.
Knead to make usre they are melted.
Clip very tip of corner and drizzle.