Preheat the oven to 375 degrees. Line 2 muffin pans with 18 paper liners.
In a large microwave safe bowl, melt the butter. Whisk in the Greek yogurt, milk, maple syrup, and brown sugar.
Add the eggs, one at a time, whisking well. Whisk in the vanilla extract.
Add the quick oats followed by the baking powder, baking soda, salt, and cinnamon. Stir well to combine.
Add the flour, then dump in the blueberries. Toss the blueberries with the flour then fold them gently into the remaining batter.
Scoop the batter into the prepared pans, filling each cup to the top and mounded a bit. Add an additional liner or two if needed. Sprinkle each muffin with turbinado sugar.
Bake for 18-21 minutes, or until a toothpick inserted in the center comes out without any wet batter. Allow to cool in the pans for 5-10 minutes before removing. Enjoy warm or place on a cooling rack to cool completely.