This spice cake is the perfect accompaniment to any holiday gathering. It’s not only deliciously perfumed with orange and a heady mixture of spices, reminiscent of gingerbread, but also perfect for those who have food sensitivities, as it’s gluten free and vegan. You can use your favorite brand of dairy-free yogurt for the frosting, but keep in mind that, for this recipe, the thicker the better. For added thickness, you can strain your yogurt through some cheesecloth set in a colander placed over a deep bowl. Depending on how loose your yogurt is, it may take up to overnight to drain.