Preheat oven to 350 degrees. Spray a donut pan with cooking spray.
In a medium size bowl, mix together the dry ingredients. In a separate bowl, mix together the wet ingredients. Combine the wet ingredients with the dry, and mix until batter is smooth and free of lumps.
Divide batter evenly between the 6 donut molds. Bake for 20-25 minutes, or until toothpick comes out clean, and donuts are set.
Meanwhile, to make the glaze, combine powdered sugar, maple extract, and water until smooth in a small bowl. Use a 1/2 teaspoon measure to spoon the glaze over the top of each donut. Enjoy!