This post may contain affiliate links. Healthy Blueberry Muffins — These skinny blueberry muffins are made with Greek yogurt instead of butter, and there’s only a little vegetable oil and sugar in these. Don’t worry, these don’t taste healthy at all! Healthy Blueberry Muffins — These skinny blueberry muffins are made with Greek yogurt instead of butter, and there’s low calorie blueberry muffins a little vegetable oil and sugar in these.