No, I haven’t tried the Jordan Marsh blueberry muffins, but if you recommend them I will. I’m jealous that you harvest blueberries. I used frozen wild blueberries. I didn’t try whole wheat flour, but someone asked about it and the author answered that you can use 75% whole wheat flour. Fortunately, I am able to get butter pretty inexpensively at Smart & Final. I get three pounds for about $8.00. I know as one baker to another how much butter we go through.