Carefully twist them apart.
Eat the half that does not have the cream.
Slowy nibble away the cookie under the cream, until there is a small cookie base covered by a wide area of cream.
Fold the cream in, over the cookie base, as it is about to fall off.
Repeat nibble and fold.
When there is a bit of cookie left, under a tower of cream, eat the hole thing in 1 bite.

And BTW: I'm considering changing my name to Tad.