2 1/4 cups all-purpose flour
2 teaspoons baking powder
1/2 teaspoon baking soda
1/2 teaspoon salt
3/4 cup unsalted butter, at room temperature
1/2 cup dark brown sugar
1 large egg
1 teaspoon vanilla extract
1/2 cup maple syrup (preferably grade B)
Heat the oven to 400 F, and line a baking sheet with parchment paper.
In a medium bowl, whisk together the flour, baking powder, baking soda and salt.
In a large bowl with an electric mixer, cream together the butter and sugar until light and fluffy.
Add the egg and vanilla, and beat until smooth.
Alternate adding the dry ingredients and the maple syrup to the wet ones in a few batches, beating to incorporate in between.
Roll a regular teaspoon of batter into a ball and put onto the baking sheet. Place the dough balls about 2 inches apart.
Bake for 8 to 10 minutes, until the cookies are golden brown around the edges.
Remove the cookies from the oven, and transfer them to a wire rack to cool.