I'm planning on making cookie sandwiches for my friend's birthday. I'm going to make the sparkled ginger cookies from VWAV, but I'm at a loss as to what I should put on the inside. Any ideas/recipes? I've got something thick and a little tacky in mind, something white, with a flavor that would compliment the ginger and other spices of the cookies. I feel like regular frosting would be too thin and whispy. Thanks!