Prepare a 10-inch (25-cm) tube pan by lining it with butter, dusting with flour, and preheat your oven to 325°F (160°C).
Put the flour, salt, and baking powder in a medium bowl and mix well.
Make a light and fluffy buttercream by mixing butter and sugar in a large bowl.
Be sure to beat each egg well after it has been added one at a time.
The Hennessy cognac, milk, and vanilla extract should be added together and whipped until well combined.
In a bowl, combine the wet ingredients and the dry ingredients gradually.
Smooth the top of the batter with a spatula after pouring it into the prepared pan.
After baking for one hour and thirty minutes, insert a toothpick into the center of the cake and make sure it comes out clean.
Let the cake cool in the pan for 10 minutes after it has been removed from the oven.
Let the cake cool completely after inverting it onto a wire rack.
In addition to the whipped cream, you may also serve the Hennessy pound cake with fresh berries.