"Holiday foods can be a source of frustration for those who suffer with food allergies. Rachel Packer of Olney develops recipes for her son, who is allergic to eggs and nuts. This cake, which is also egg- and dairy-free, is surprisingly moist yet light. The glaze adds a nice cinnamon dimension, but it's optional if you'd like to keep the cake on the not-too-sweet side. Through much trial and error, Rachel found that this particular cake batter rises better in the oven when one batch of it is assembled at a time. It comes together in minutes; the directions reflect the slightly staggered baking times of the two layers. The cake also can be baked in two 7-inch wide, 2-inch-deep cake pans; this will leave you with enough batter (and apples) left over to make two cupcakes. Adjust baking times as needed. Make Ahead: The cake can be made a day in advance...."