Heat the cream in the microwave until steaming, about 45 seconds. Pour over the chocolate chips and let sit for 1 minute. Whisk together until smooth and set aside.
Whipped Cream Filling
In the bowl of a mixer, add the heavy whipping cream, powdered sugar and vanilla extract. Whisk until medium peaks form.
Spread a thin, even layer of the whipped cream mixture across the bottom of a 9x13 pan. Add an even layer of the chocolate graham crackers. Top with 1/3 of the ganache and smooth. Add 1/3 of the remaining whipped cream and smooth.
Repeat the layers 2 more times: graham crackers, ganache, whipped cream.
Once all the layers have been added top with topping of choice (mini or regular chocolate chips, chocolate curls, crushed oreos, chocolate candies, etc.)
Cover with plastic wrap and chill in the fridge for at least 4 hours, or overnight.