I only saw once cassava fufu being made with actual cassava. Perhaps you could use specific fufu flour, I think the common brand is Tropiway and in my place, it could be found in Asian supermarket.

Since I don't have to tools to pound cassava in the states, I have resorted to buying fufu flour mix at local African markets. I usually use a Ghanaian brand, Mama's Choice. It works pretty well! Good luck!

On the Cooking Channel show Eden Eats, Eden was shown how to make fufu at a Ghanaian market in Nashville. The clip is available at the grocery store's website:

http://www.gateway2africa.com/
Scroll down and you'll see the clip, or you can watch it here: http://www.youtube.com/watch?feature=player_embedded&v=4lBfBTcr5vY

I hope this helps!

I think you might be able to find frozen ground/mashed cassava in the freezer section of any Asian/Chinese supermarket.

Good Morning! here is the recipe we use in the Dominican Republic for Pure de Yuca or mashed cassava. Hope this helps.
http://dominicanflavor.com/side-dishes/dominican-style-mashed-yucca-cassavapure-de-yuca-dominicano.html

Buen provecho!

My dad is Nigerian and we use Bisquick instead of cassava or yam, better tasting in my opinion. He starts by boiling a small pot of water, sorry we don't measure, and pours most of the boiling water into a container. He then adds about of cup of Bisquick to the pot and begins to stir. He slowly adds the reserve water to the pot and continues to stir until he gets the right consistency, like a smooth ball of dough, not too sticky. I hope this is in some way helpful!

I use Tropiway's FuFu Flour and have always had a good result. And when I have periods of paleo dieting, I modify it to make a kind of flatbread.