1. Preheat the oven to 350°F (180°C).
2. In a large bowl, mix the flour, sugar, salt, baking soda, and cocoa powder.
3. In a second bowl, beat the eggs, sour cream, butter, vanilla, and milk.
4. Incorporate the dry ingredients into the wet mixture and mix gently.
5. Butter a 9-inch cake pan and pour the batter into it.
6. Bake for 25 to 30 minutes.
7. Add a ganache or sprinkle the cake with powdered sugar before serving.