are you trying to make a cobbler i think it is called? kinda like a layer of cake on top of stewed fruit? i am sure the muffins and mug cakes you microwave hold the moisture in more due to the shape they are cooked in if that makes sense. ditto if you cook them in a waffle iron. they dont get leathery for that reason. i would go more for a coconut flour sponge type of recipe for a cobbler myself.