Karnis figured out that he need three, to really tune his barrel. He discovered that he needed the Chocolate covered glazed, glazed old fashion and glazed blueberry. After, examining his groups, he thought the blueberry needed a little tweeking, either that or he was a little hungry.
My Hawkeye would just not respond to two or three, had to go a full load, plain cake, glazed, glazed old fashion, chocolate covered cake, chocolate glazed, cinnamon old fashion and a plain cake. Man what a difference this made!
Although, our experiment is highly scientific your results may vary. (Source)
And the video with accuracy report: