Preheat oven to 325°F.
Line muffin tin with paper liners.
Mix crushed wafers with melted butter.
Press mixture into liner bottoms firmly.
Beat cream cheese until smooth and fluffy.
Add sugar and mix thoroughly.
Beat in eggs one at a time.
Stir in vanilla extract completely.
Add cocoa powder and food coloring.
Mix until color is even throughout.
Pour filling over crusts carefully.
Fill each liner three-quarters full only.
Bake for 20 minutes until set.
Cool completely before removing from tin.
Refrigerate for 2 hours minimum.
Top with whipped cream before serving.