Whisk eggs and brown sugar in another bowl until smooth.
Add milk and maple syrup and whisk to mix.
Pour over dry ingredients and add 4 T of the melted butter.
Fold in with a rubber spatula until dry ingredients are just moistened.
Put papers in a 12-muffin pan. Fill each muffin cup 2/3 full. Place muffin pan on an insulated cookie sheet.
Bake in middle of oven for 24 minutes.
Let muffins cool in the pan for 5 minutes. Brush the tops with remaining melted butter. Finish cooling on a wire rack. Eat immediately or let cool, then freeze.