Set your oven to 350°F (175°C). Line a baking sheet with parchment paper or a silicone baking mat to prevent sticking and promote even baking.
In a large bowl, whisk together 1 cup all-purpose flour, 1 teaspoon baking soda, 1/2 teaspoon salt, and 1 teaspoon ground cinnamon. This ensures even distribution of leavening and spices.
In a separate bowl, use an electric mixer or whisk to cream 1/2 cup softened unsalted butter with 1 cup brown sugar and 1/2 cup granulated sugar until light and fluffy—about 2-3 minutes. This aerates the mixture for tender cookies.
Beat in 1 large egg and 1 teaspoon vanilla extract until combined. Then, slowly mix in 1/2 cup maple syrup. The maple syrup adds moisture and that signature flavor.
Gradually add the dry ingredients into the wet mixture, stirring gently until just combined. Avoid overmixing to keep the cookies tender.
Stir in 2 cups rolled oats until evenly distributed. If you like, fold in 1 cup chocolate chips or nuts for extra texture and flavor.
Drop rounded tablespoons of dough onto the prepared baking sheet, spacing them about 2 inches apart. Bake for 10-12 minutes or until edges are golden and centers look set but still soft.
Let the cookies cool on the baking sheet for 5 minutes before transferring them to a wire rack to cool completely. This step helps them firm up without becoming hard.