Be sure all of your ingredients are at room temperature before beginning the recipe.
Preheat oven to 350°F. Line two baking sheets with parchment paper and set aside.
In a mixing bowl, whisk together the flour, baking soda, and salt.
In a large mixing bowl, whisk together the lemon zest, lemon juice, sugar, maple syrup, vanilla extract, and coconut oil.
Stir the dry ingredients into the wet ingredients until a smooth dough is formed.
Let the dough sit for 10 minutes to stiffen up.
Scoop out a heaping tablespoon of dough and mold it into a ball with your hands. Place onto the prepared baking sheet. Optional: roll the dough ball around in the extra sugar to coat before placing on the baking sheet.
Leaving about 2 inches between each cookie dough ball on the baking sheet, repeat with the remaining dough.
Bake 10 to 12 minutes until the cookies have spread a bit, the bottoms are lightly browned, and the tops have started to crackle.
Transfer the cookies to a wire cooling rack to cool completely.