COMBINE crumbs, sugar and butter in small bowl. Press rounded tablespoon of crumb mixture onto bottom of each cup. Divide 1/2 cup morsels between all cups.
BEAT cream cheese in small mixer bowl until fluffy. Add sweetened condensed milk, egg, cocoa and vanilla extract; beat until smooth. Spoon 1/4 cup mixture into each cup.
BAKE for 18 to 20 minutes or until centers are set. Remove from oven to wire rack. While still warm, top cheesecakes with with remaining morsels. Morsels will soften but will retain shape. Cool completely. Refrigerate for at least 1 hour.