Prepare Bakers Truth™ Chocolate Creme Cake Base according to bag directions. Add bittersweet chocolate chunks and mix for 30 seconds on low speed to combine. Scale 5 oz batter per muffin into lined muffin baking sheet.
Bake at 350°F for 15-20 minutes. Cool.
Finish with a sprinkle of chocolate chips. Melt additional chocolate and drizzle top of each muffin.