Add the butter, brown sugar, and vanilla extract to a large mixing bowl. Beat with an electric mixer until well combined.
1 cup unsalted butter, 3/4 cup light brown sugar, 1 teaspoon vanilla extract
Add the eggs and maple syrup and beat until smooth and fluffy. Scrape down the sides of the bowl with a rubber spatula, then mix again to make sure everything is combined.
2 eggs, 1/3 cup pure maple syrup
Add the flour, baking powder, and baking soda. Mix just until everything is combined. The dough will be soft at this point.
2 ½ cups all purpose flour, 1 teaspoon baking powder, 1/4 teaspoon baking soda
Cover the bowl with plastic wrap and refrigerate for about three hours, until the dough is firm.
When the three hours are up, preheat the oven to 350 degrees F.
Remove the dough from the refrigerator and scoop it into 3-tablespoon balls. Place them evenly on a baking sheet, about 8 cookies per sheet.
Bake for 10 to 12 minutes, until the bottoms are lightly golden brown.
Let the cookies rest on the baking sheet for a few minutes. Then carefully move them to a wire rack to cool completely.