Preheat oven to 325.
Set rack in the middle.
Grease an 8-inch springform pan with butter and line the bottom with foil.
Snap the pan closed and wrap another foil around the bottom and up the sides.
Set the springform pan in a large roasting pan; set aside.
Beat the eggs with mixer on high for 5 minutes, or until doubled.
In the meantime, set up a double boiler by placing a large bowl that is safe to use on the stove over a saucepan of boiling water.
Add chocolate and butter.
Stir frequently with a rubber spatula until melted and smooth.
Fold 1/3 of the egg foam into the chocolate mixture.
Keep folding until all egg is incorporated.
Fold in half of the remaining foam, and continue to fold until no streaks appear.
Add in the rest of egg foam, continue to fold until incorporated.
Fold in 2 cups crushed Joe-Joe's.
Pour the mixture into the springform pan.
Bring a large pot of water to a boil.
Set the roasting pan on the oven rack, and pour enough boiling water to come halfway up the sides of the pan.
Bake for 35 to 40 minutes, or until the edges of the cake have just started to set.
Remove from water bath and set on a wire rack to completely cool.
Cover with foil and refrigerate over night.
Decorate with the rest of the crushed cookies.
Run a knife around the edges and snap it out of the pan.
Slice and serve.