Yes. I don't think there are full details available. They smell sort of like a spiced parsnip to me. At some point in 07 Plantlady2 posted her dahlia tuber bread recipe, similar to zuchini bread I guess. Search for plantlady2 posts on this forum in the search box and you might find it.

Here is a link that might be useful: mention of dahlia tubers as food

I had some of Plantlady2's dahlia bread at her garden one year. (Oh, heaven!! That gazebo! Those thousands of dahlias! That Garden!! Swoon!!)
The bread was interesting- as plantlady2 said-- lots of cinnamon will make anything edible!! But before you start noshing on dahlia tubers be sure they haven't been sprayed with a systemic when growing or dipped in something nasty (bleach? Sulfur?) before storing.
Ellie

When I got my order from Ferncliff, they were so plump and healthy looking it made me think of making some baked yams.