1Heat oven to 300ºF. Spray 12 medium muffin cups, 2 1/2x1 1/4 inches, with cooking spray. Sprinkle 1 teaspoon of the chocolate wafer crumbs on bottom of each muffin cup.
2Beat cream cheeses in medium bowl, using wire whisk, until smooth. Beat in 2/3 cup sugar, the milk, flour, vanilla and egg whites until almost smooth.
3Reserve 1 1/2 cups of the batter. Beat 2 tablespoons sugar and the coffee into remaining batter, using wire whisk, until blended. Carefully spoon about 3 tablespoons coffee batter into each muffin cup. Carefully spoon 2 tablespoons reserved vanilla batter over coffee batter. Mix 1 tablespoon sugar and the cinnamon; sprinkle over vanilla batter.
4Bake about 18 minutes or just until set. Cool 30 minutes. Cover and refrigerate at least 2 hours but no longer than 24 hours. Run small metal spatula around edge of each muffin cup; remove cheesecakes. Sprinkle with cocoa.