Preheat the oven to 325 degrees.
Grease and flour three 8x2 round cake pans.
In the bowl of your mixer, combine dry ingredients: cake mix, flour, brown sugar, and salt. Whisk for 30 seconds to blend.
In another bowl, combine sour cream, water, eggs, canola oil, vanilla extract, maple extract, & maple syrup.
Add the wet ingredients to the dry and mix on medium speed for 2 minutes. Stop after 1 minute to scrape the sides and bottom of bowl then continue to beat for the second minute.
Stir in the chopped pecans.
Pour into prepared pans and bake at 325 degrees....check after 22 minutes- Cakes are done if middle of cake springs back when touched, a toothpick inserted in the center of the cake comes out clean or with just a few crumbs attached.
Makes about 7 cups of batter.