A little pie tin crumb cake that is meltingly tender (the yogurt helps) and reminiscent of yesteryear. No such cake in your ‘yesteryear’? All you remember is a Twinkie? Well, here’s a cake to put the Twinkie on its tail. This is mellow yellow of crumb, pretty as a picture in a pie tin, and slices into moist, golden wedges of simply great homespun cake. This is a good keeper but one of those small, gone in 2 days little cakes. In days past, they used cream of tartar and some soda in cakes like this. Here I've opted for the more common baking powder and soda combination.