Beat with an electric whisk for 3 minutes the softened butter with the granulated sugar and the lemon zest.
Add eggs, vanilla extract, lemon juice and sour cream and beat again to incorporate.
Add the dry ingredients, flour, baking powder and salt and mix with a spatula to incorporate them.
Preheat the oven to 350°F and line a loaf pan with parchment paper. Bake the lemon cake for 55 to 60 minutes until golden brown. Let it cool completely before removing from the pan.
Mix powdered sugar with heavy cream and lemon juice in a small bowl with a fork and glaze the cooled lemon pound cake with it.
Serve immediately with fresh berries and whipped cream and enjoy.