Preheat the oven to 300 degrees.
Spray a 9-inch bundt cake pan with nonstick baking spray.
In a large mixing bowl, add the flour, baking soda, and salt and whisk until combined.
In a separate large mixing bowl, add the butter and sugar and cream until light and fluffy.
Add eggs to the butter mixture, one at a time, mix to combine well after each egg.
Add in the sour cream and mix until combined.
Add the Whiskey and mix until combined.
Gradually begin to add the dry ingredients and mix until combined.
In a small bowl add the cinnamon mixture ingredients, stir to combine.
Pour half of the batter into the prepared bundt pan.
Sprinkle half of the cinnamon-brown sugar mixture on top of the batter.
Pour the rest of the batter on top of the cinnamon brown sugar mixture.
Smooth this layer evenly.
Sprinkle the remaining cinnamon mixture on top of the batter.
Bake in the preheated oven for 70 minutes or until a toothpick comes out clean.
Cool the cake for 15-20 minutes in the bundt pan.
After cooling, turn onto a serving plate.