Melt the butter in a small sauce pan.
Combine the graham crumbs, sugar, and cinnamon in a bowl.
Add the melted butter and toss until well coated.
Press into a 9 ½ inch deep pie dish.
Mix the juice, yolks, and sweetened milk in a separate bowl and pour into the shell.
Bake at 325 degrees for 15 to 20 minutes until the fillings sets slightly.
Cool completely then garnish with the whipped cream.