I'm not sure, but since it's posted on an active blog you could ask over there and I bet the blogger, Chelsea, would tell you. She seems to be pretty good about answering everyone's questions. I found this to be a fine cake even without the crumbs. I actually used it to make cupcakes once. I bet you could make crumbs with flour, butter, and a sweetener like stevia. I'm not sure about alternative flour for the cake itself as I've never tried that.
I'm not sure, but since it's posted on an active blog you could ask over there and I bet the blogger, Chelsea, would tell you. She seems to be pretty good about answering everyone's questions. I found this to be a fine cake even without the crumbs. I actually used it to make cupcakes once. I bet you could make crumbs with flour, butter, and a sweetener like stevia. I'm not sure about alternative flour for the cake itself as I've never tried that.