First prepare the chocolate frozen custard- chill the custard and then churn in. After its been churned- freeze until solid, about 4-8 hours depending on how cold your freezer is.
Once the ice cream is chilled bake the cookies following the chewy chocolate chip cookie recipe.
Scoop a large scoop of ice cream on 8 cooled cookies and top with a second cookie. You should eat immediately or wrap with plastic wrap and freeze for later. The chocolate custard melts quickly!