Coat the Bundt pan with a lot of grease and flour. Pound cakes are fond of sticking, and here is no place to economize. Preheat your oven to 325°F (163°C).
Put the flour, baking powder, and salt in a medium bowl and whisk until smooth. Set aside.
Combine the butter, shortening, and sugar in a large bowl and beat until light and fluffy. This is an important step- beat for about 5 min. Here, the magic begins, making that bit of broken bread.
Add eggs one at a time and mix well after adding. Stir in the vanilla extract.
At low speed, pour the flour mixture in three parts alternating milk and Hennessy. Begin and end with flour. Blend until combined- do not over blend.
Add the batter to your Bundt pan and flatten the top. Bake approximately 70-80 minutes, or until a toothpick inserted in the middle of it comes out clean.
As the cake cools, combine powdered sugar, Hennessy, and a splash of milk until smooth. When the cake is cool slightly, drizzle or brush the glaze generously over the top.
Cut, eat, and have the ultimate blend of buttery cake and that silky Hennessy finish.