Place butter, shortening, and sugar in a bowl and mix on medium for 1 minute.
In a separate bowl combine Clabber Girl Baking Powder, Clabber Girl Baking Soda and salt; mix well. Reserve one tablespoon for the pecans.
Add dry ingredients to the butter mixture and mix on low for 1 minute.
In a measuring cup combine sour cream, whiskey, and eggs. Add mixture to the batter and combine on medium for 1-2 minutes. Make sure to scrape the side of the bowl.
In a small bowl coat the pecans with the reserved tablespoon of flour (this should prevent the pecans from sinking to the bottom).
Gently fold pecans into batter.
Pour batter into prepared pan and bake for 50-55 minutes.
Let cake cool before glazing.
Glaze
Combine whiskey, water and powdered sugar until smooth. Pour over cooled cake.
Recipe by I bake he shoots at http://ibakeheshoots.com/bourbon-pecan-pound-cake/