01 -
Preheat oven to 175°C. Lightly grease a 33 x 23 cm baking pan with nonstick cooking spray.
02 -
Prepare the chocolate cake mix according to package instructions. Pour batter into the prepared pan. Bake for 30–35 minutes or until a skewer inserted into the centre comes out clean.
03 -
Upon removing the cake from the oven, immediately use the handle of a wooden spoon to poke holes, approximately 1.25 cm in diameter, across the surface.
04 -
Microwave the hot fudge sauce for about 45 seconds until pourable. Slowly drizzle the sauce over the cake, ensuring some seeps into each hole. Allow to cool completely at room temperature.
05 -
In a bowl, whisk together half & half with instant chocolate pudding for 2 minutes until thickened. Let stand for 5 minutes to fully set.
06 -
Fold the thawed Cool Whip into the chocolate pudding mixture until smooth.
07 -
Spoon the pudding mixture evenly over the cooled cake and smooth with a spatula.
08 -
Scatter crushed Oreo cookies evenly over the surface and gently press gummy worms into the crumbs.
09 -
Cut into 18 portions. For neater slices, refrigerate for at least 2 hours before serving. Store leftovers covered in the refrigerator for up to 4 days.