Preheat your oven to 350 degrees. Grease a standard muffin tin and set aside.
In a large bowl, whisk together the flour, sugar, baking powder, cinnamon, nutmeg, and salt.
Make a well in the flour mixture and pour in the milk, eggs, butter, and vanilla. Mix just until the ingredients are no longer dry.
Fold in the blueberries.
Scoop the muffin mix into the muffin tin until each mold is completely filled - almost overflowing.
Sprinkle sugar on top of each muffin.
Place the muffin tin on a cooking sheet and bake for 40 minutes, until a toothpick inserted in the center of the muffin comes out clean.