I have not tried these yet, but boy have they been all the rave on the OH Board!
3 - 8 oz. packages of cream cheese
1 cup of Splenda
1 1/2 tsp Vanilla
8 oz Sour Cream
2 TBSP Splenda
1/4 tsp Vanilla
Bring cream cheese to room temperature. Place cream cheese in a bowl, and add one egg at a time, beating with a hand mixer. Slowly add the Splenda and vanilla. (The batter will be thin.) Pour into paper cupcake liners. (Makes approx. 12 very full cupcakes.) Bake in a 300 degree oven for 30 - 35 minutes (until large cracks appear on the top). Remove from oven and cool for 5 minutes.Combine filling ingredients and add a tsp on top of each cupcake and return to the oven for 5 minutes.Cool and then keep refrigerated.