Preheat oven to 350°F. Line 2 cookie sheets with parchment paper.
In a large bowl of an electric mixer, beat butter and sugars until creamy.
Add maple syrup, egg, and vanilla extract and continue beating until well incorporated.
In a small bowl combine the flour, cinnamon, baking soda, baking powder, and salt.
Lower the mixer speed and add dry ingredients to wet ingredients.
Stir in oats and pecans.
Using a medium cookie scoop, scoop dough onto prepared cookie sheets.Do not flatten.
Bake in the oven for 11-12 minutes.
Cool on cookie sheets for 5 minutes then carefully, using a metal spatula, lift off and place on wire racks. Let cool completely. Note: They will get crisper as they cool.
Maple Glaze
Whisk powdered sugar with 2 tablespoons of maple syrup together. Add additional maple syrup if it seems too thick. You want it to be a little thick as it will set better.
Place in a small sandwich bag, snip the corner. and squeeze lightly over the cookies. Let the cookies sit while glaze firms up.
Notes
STORE/FREEZEStore your cookies in an airtight container at room temperature for up to 5 days. Freeze your cookies, minus the frosting, in a freezer bag or container for up to 3 months.