Yes, those muffins pictured are blueberry, not chocolate. As you can see, there’s a lot of blueberries in these. Combined with the lemon, the blueberry flavor is enhanced even more.
I was very pleased with this recipe, especially considering I originally sought it out so I could use leftover crême fraîche. I’ve made a few lemon muffins and blueberry muffins in the past (which I love) and this was similar to neither of those, and yet that was still a good thing.