I had never heard of "coffee flour" before, nor had I seen this product at Trader Joe's, but this tweet from the manufacturer is about as explicit as one could ever expect about being the supplier to TJ's:
Here's the manufacturer's web site: http://www.coffeeflour.com/
It seems that identifying TJ's suppliers from the products they promote on Twitter is becoming a thing that I do.
Note that we also learned this week from a national recall that Manzana Products supplies the wonderful Gravenstein applesauce and the second-best Organic Unsweetened Applesauce for TJ's. You can see their own brands of the same items here.