The blueberry and huckleberry bushes in the yard are overflowing with fruit. Somehow we've got a bunch of berries left that were not actually eaten while picking. I promised the boys blueberry muffins last week, so it was time to come up with a recipe that will make them happy and be good for them at the same time. In keeping with grain-free treats, I used cassava flour for the majority of this recipe. The kids said these are the best ever.