PREHEAT oven to 325° F. Paper-line 24 muffin cups. Place 1 level tablespoon of cookie dough (1 square if using bar dough) into each muffin cup.
BAKE for 10 minutes or until cookie has spread to edge of cup.
BEAT cream cheese, sugar and flour in large mixer bowl until creamy. Add eggs and vanilla extract; mix well. Stir 1/2 cup morsels into batter. Spoon 2 heaping measuring tablespoons of batter over each cookie in cup.
BAKE for additional 13 to 15 minutes or until just set but not browned. Remove from oven to wire rack. Cool completely in pans on wire rack. Refrigerate for 1 hour.
MELT remaining 1/4 cup mini morsels in small, heavy-duty plastic bag on HIGH (100%) power for 30 seconds; knead. Microwave at additional 10- to 15-second intervals, kneading until smooth. Cut tiny corner from bag; squeeze to drizzle lightly over each cheesecake just before serving.