Peel and dice apples. In a cast iron skillet over medium heat, add 1 tablespoon butter. When melted, add the apples and stir well.
Sprinkle with 2 tablespoons of brown sugar, and 1 tablespoon granulated sugar and cinnamon and mix well. When apples begin to soften a bit, add 1 tablespoon of the whiskey and let it reduce down.
Remove and set aside to let the apples cool.
In a mixing bowl, add the flour, baking powder, salt, and nutmeg. Mix well.
In a separate mixing bowl, add the egg and beat well. Add the ¾ cup sugar, 1 tablespoon melted butter, and whisk until smooth. Gradually, add the flour mixture and mix until smooth. Add the Mountain Dew and mix well. Stir in the apples and mix until well combined.
In a Dutch oven, over medium high heat, add about 2 inches of oil and heat to 350 degrees F. Then, with a regular tablespoon, dip the apple mixture and drop a heaping spoonful into the oil. Fry about 2 to 3 minutes on each side. Remove and let drain on a wire rack to cool slightly, then glaze and serve.