If you are craving gluten free blueberry muffins, this sugar-free, or low-in-sugar, version is amazing! They turned out very light, despite not sifting the flour blend. I added 1-1/4 cups fresh blueberries, but you can easily get away with using 1 cup. We just love blueberries! The streusel topping really makes these tender and moist muffins! I hope you enjoy them. Read more below to learn about the sweetener that I used.