In the bowl of a stand mixer beat the butter and Splenda Magic Baker Sweetener until creamy. Add eggs and vanilla, beating well.
In a separate bowl, whisk together flour, cocoa powder, baking soda, and salt.
Slowly beat into the butter mixture until it has been fully incorporated. Stir in the chocolate chips and candy cane pieces until evenly distributed.
Spray a 10-inch cast-iron skillet with nonstick cooking spray. Spread the dough out evenly into the skillet (dough will be thick). Sprinkle another teaspoon chocolate chips and peppermint candy on top if desired.
Bake, uncovered, 22 minutes for a gooey center, and 25 minutes for a more done center. Remove, let cool slightly, and serve!
Note
For a delicious peppermint whipped topping, stir ¼ teaspoon peppermint extract into 8 ounces of sugar-free whipped topping. Add a dollop to the top of each serving.