01 -
In a large mixing bowl, combine chocolate cake mix, eggs, oil, and water. Stir to combine. Follow directions on the back of the Cake Mix Box and bake in a greased 9×13 cake pan.
02 -
When the cake is done baking, remove it from the oven and immediately poke holes all over the top with the end of a mixing spoon. Set aside.
03 -
In a medium bowl, combine sweetened condensed milk and Hershey chocolate bars. Microwave for 30 seconds, stir, then microwave for an additional 15 seconds. Stir until completely combined.
04 -
Pour the sweetened mixture over the top of the holes on the cake. Use a rubber spatula to push the mixture down into the holes and along the edges of the cake. Let cool on the counter for 1 hour, then cover with plastic wrap and refrigerate for 2 hours.
05 -
Place a large mixing bowl in the freezer to chill in preparation for the chocolate whipped cream topping.
06 -
In the chilled mixing bowl, add 2 cups of heavy whipping cream. Use a hand mixer on high speed to mix until it starts to thicken. Add powdered sugar, cocoa powder, and vanilla extract, then continue mixing until incorporated and stiff peaks form.
07 -
Spread the chocolate whipped topping evenly over the entire top of the cake. Drizzle chocolate syrup and sprinkle mini chocolate chips over the top.
08 -
Refrigerate the cake until ready to serve. Store leftovers in the refrigerator to maintain the consistency of the whipped topping.