The Chocolate Ganache Surprise cupcake has been offered as a free secret flavor a few times recently at Georgetown Cupcake, and I think part of it is because it's a really nostalgic flavor that anyone will enjoy. As you can see in the photo above, the cupcake appears to be a regular Chocolate Ganache cupcake.
However, once you take a look inside, you can see the "surprise" element. Much like the classic Hostess cupcake, the cupcake is filled with a thick vanilla frosting core. This is a delicious and fun addition to their regular chocolate cupcake, and I'm sure kids of all ages will enjoy it as well :o)