Blueberry yogurt muffins (whole wheat)

I made these using white whole wheat flour and a smidge more than 1/2 cup white (refined) flour. Pans greased with real butter because I still need to buy baking spray for my new house. I don't think the oven was at the full 375 when I put them in, and it may have gone up to 400 mid-baking, because my oven has been a bit weird lately.

And, we shall see...