These are easy, delicious and the recipe worked well with gluten free substitutes. I came across the recipe through the black apple who found it via smitten kitchen who adapted the recipe from this book by Wayne Brachman. I used the sugar quantities that Emily used as I like my cookies a wee bit chewy too. I also only used butter for the filling instead of shortening. We didn't have quite enough icing sugar in the house so my filling is a little soft but oh so good! (and easy enough to spread with just the back of a spoon)
It has been 4 or 5 years since I had a real oreo and these homemade ones seem to taste very close to my memory of the real deal!