First we baked two 9x13 chocolate sheet cakes. This is one of them. It will be the base. We actually baked them the night before & froze them. It made them a lot easier to work with & saved on freezing time before the party.
Next I spread whipped topping on top of the base layer. Then I started to sprinkle crushed cookie crumbs on top. You can use Oreos but to fit in the budget I bought a similar brand at Aldi. I crushed the cookies by putting them in a Ziploc bag & then rolling over it with a rolling pin.
The next layer is ice cream. I cut chunks from a boxed 1/2 gallon of ice cream. I ended up using an entire 1/2 gallon & then one slice of another. The amount depends on how thick you want your layer to be. Like Megan, I recommend you splurge & use a quality ice cream. It really does make a big difference. We used Purity.
My little helper enjoyed licking the lid of the whipped topping container while she watched.
I forgot to take a picture, (I was in a hurry that morning b/c of the party), but I added another layer of cookie crumbs. Then it was time for the 2nd cake layer to be added. Before I did that I put globs of whipped topping in each corner. This helped to hold the top layer to the rest of the cake. After that I put a thick layer of whipped topping over the whole thing using it like a frosting. It was hard to get on the sides b/c of the hot weather. In the end it didn't really matter. Once it was all assembled we popped it in the chest freezer to await it's debut.
A very important step! Don't forget to let your sidekick get a lick of the spoon when you are done. This will make them very happy.
Princess & Bugsy were fascinated by the whole process. They waited patiently & were each rewarded with a spatula to lick.