For the Cake:

1. Preheat the oven to 350°F. Spray the bottom of a 9-inch by 13-inch pan with cooking spray.
2. Line the bottom of the pan with chocolate chip cookies.
3. In a large mixing bowl, combine the cake mix with the ingredients listed on the box: water, oil, and eggs.
4. Beat the cake mix until it’s well combined. Pour the batter over the top of the cookies.
5. Bake at 350°F for 18-22 minutes until the cake is cooked all the way through. Test the cake for doneness by inserting a toothpick into the center of the cake. If the toothpick comes out clean, your cake is done. Allow the cake to cool for 20-30 minutes.
6. Take a wooden spoon or another round object and poke holes over the top of the cake.
7. In a small mixing bowl, combine the instant chocolate pudding with the milk and whisk together until the powdered mix is dissolved. Pour the liquid pudding mix over top of the cake, and try to fill the holes with the pudding mix.
8. Refrigerate the cake until the pudding is firm, about 10 minutes. Make sure the cake is completely cooled before frosting.

For the Topping:

1. Place the mixing bowl and whisk attachment in the freezer for 5 to 10 minutes to chill while you are preparing the next steps.
2. Place 1 tablespoon of cold water in a small dish. Sprinkle the gelatin over the cold water, trying to spread the powder evenly. Allow the gelatin to become solid (about 2-3 minutes).
3. Next, melt the solid gelatin in the microwave for 3-5 seconds until it turns back into a liquid. Watch it closely! Let it cool. 
4. Prepare a batch of whipped cream. Chill the bowl in the freezer for 5-10 minutes. Beat the heavy whipping cream in the chilled bowl at medium-high speed until soft peaks form. Slowly add the powdered sugar and liquid gelatin and beat at high speed until stiff peaks form. Set it aside
5. In a large Ziploc bag, roughly chop and smash the cookies into small pieces/crumbs. Fold the smashed cookies into the prepared whipped cream, reserving about 1/2 cup or so for the garnish.
6. Heat the hot fudge according to the instructions on the box and drizzle over the top of the cake. Finish it off by sprinkling the remaining cookies on top.