Streusel Muffins, Streusel

gf flour blend (org. brown rice flour, potato starch, sweet rice flour, tapioca starch, org. rice milk, expeller-pressed non-gmo canola oil, brown sugar, org. unrefined cane sugar, unsalted butter, grainless baking powder, sea salt cinnamon, vanilla extract, baking soda and xanthan gum