For crust, stir together the crushed cookies, graham crackers, and the 1 tablespoon melted butter. Press crumb mixture onto the bottom and up the sides of a 9-inch tart pan with a removable bottom. Bake in a 350 degree F oven for 10 minutes or until lightly brown. Set crust aside to cool.
For filling, in a blender container or food processor bowl combine the cream cheese, the 3 tablespoons softened butter, half-and-half or light cream, eggs, sugar, and vanilla. Cover and blend or process until smooth. In a bowl stir together chopped candies. Stir into cream cheese mixture. Pour filling into crust-lined pan. Place in a shallow baking pan to catch any drips.
Bake about 30 minutes or until center appears nearly set when shaken. Cool on a wire rack for 1 hour. Cover and chill at least 4 hours before serving. Makes 12 servings.