Preheat oven to 350 degrees F.
Grease the wells of a 12 cup cupcake pan.
In a large bowl combine dry ingredients: flour, cinnamon, nutmeg, baking powder, baking soda, and salt.
In a medium bowl combine butter, brown sugar, eggs, and milk.
Add wet ingredients and carrots into dry ingredients, stir just until combined.
Pour muffin batter into the prepare cupcake pan filling each well about 2/3 full.
Bake for about 20 minutes or until a cake tester inserted into the middle of a muffin comes out clean.