confetti cheesecake cupcakes with cake batter frosting

From: http://www.facebook.com/note.php?note_id=227008443995265
INGREDIENTS
Confetti (or Funfetti) cake batter, use your favorite homemade or boxed version)8 oz package cream cheese, softened
1 egg
1/4 cup sugar
1/2 teaspoon vanilla
Preheat oven to 350 and line 24 muffin tins with liners. Spoon cake batter into each tin until it is about 1/2 full. In a medium bowl, beat cream cheese, egg, sugar and vanilla on medium speed until smooth. Spoon one spoonful over the top of each cupcake. Bake for about 15 minutes or until set.

Cake Batter Cream Cheese Frosting:
1 stick salted butter, softened
8 oz cream cheese, room temperature
1/2 teaspoon vanilla
1 teaspoon Baker's Mystery Flavor (you could omit this, but I really liked the baked flavor it adds)
3 cups powdered sugar
1/2 cup white cake mix (MIX--NOT BATTER)

In the bowl of a mixer, beat butter, cream cheese and extract(s) on medium speed until smooth. Add powdered sugar and cake mix and beat on low until just combined. Increase speed to medium-high and beat for 2 minutes. If frosting is too thick, mix in a bit of heavy ix in a bit of heavy cream or milk until desired consistency is reached. Once cupcakes are cool, frost generously. And add sprinkles.