Preheat oven to 375° F and line a baking sheet or two with parchment paper.
Combine butter and brown sugar.
Add eggs and maple syrup, and stir.
Add in flour, baking soda, and salt, and mix until just combined.
In a separate bowl, combine the remaining sugar and cinnamon.
Form balls of dough, about 1 - 1 ½ tablespoons.
Roll the dough balls into the cinnamon sugar mixture, and place on the baking sheet a couple inches apart.
Bake for about 8 minutes, until slightly golden brown.
Let the cookies cool for about 5 minutes on the pan, and then move to a wire rack to cool completely.
Notes
When rolling the dough into balls, the surface does not need to be smooth.These cookies will look very puffed up straight out of the oven, but will flatten as they cool.