I found this recipe in Country Woman magazine. I have not tried this recipe, but I'm posting it for safe keeping. I plan to use Pillsbury reduced sugar brownie mix, sugar free chocolate chips, no sugar added peanut butter and Splenda sugar blend.
Prepare brownie batter according to package directions; stir in chocolate chips. For filling, in a small bowl, beat peanut butter, cream cheese, egg and sugar until smooth.
Fill paper-lined muffin cups one-third full with batter. Drop filling by teaspoonfuls into the center of each cupcake. Cover with remaining batter.
Bake at 350 for 15-20 minutes or until a toothpick inserted in brownie portion comes out clean. Cool for 10 minutes before removing from pan to a wire rack to cool completely. Dust with confectioners' sugar. Store in the refrigerator.