Using a mixer, cream together butter and sugar.
Add eggs one at a time, mixing between each addition.
Mix in maple syrup.
Add flour, baking soda, cream of tartar, and salt to your batter. Mix until incorporated; final batter will be relatively fluffy.
While still in the mixing bowl, press batter into a uniform ball; cover and refrigerate for 30-45 minutes.
While batter is in refrigerator, combine 1/2 cup sugar with 1 tablespoon cinnamon in a small bowl.
Once batter has become firm (30-60 minutes), remove from refrigerator. Shape rounded teaspoons of batter into balls; roll balls in cinnamon sugar before placing on a plate or a greased cookie sheet.
Preheat oven to 375 degrees F. Place balls of dough in refrigerator while oven is preheating.
Once oven is hot, place dough balls on a greased or parchment-covered cookie sheet and cook for 10 minutes. Once cookies are baked, immediately place them on a wire rack to cool.