Preheat your oven to 400ºF and grease a cookie sheet.

In a large bowl combine the flour and cinnamon. Set aside.

In another large bowl add the butter, pecans, powdered sugar, and vanilla extract, and beat until blended. Batter will be very stiff.

Using your hands, roll 1-inch balls and place on the cookie sheet. Bake until light brown, about 10-12 minutes. Cool slightly then roll cookies in the powdered sugar. Cool completely before serving.