1. Preheat oven to 350°F (175°C). Grease and line an 8×8-inch or 9-inch cake pan.

2.

3. In a bowl, whisk flour, baking powder, and salt together.

4.

5. In a separate large bowl, cream butter and sugar until light and fluffy.

6.

7. Add eggs one at a time, mixing well after each addition.

8.

9. Mix in vanilla extract.

10.

11. Alternate adding dry ingredients and milk into the butter mixture until smooth batter forms.

12.

13. Pour batter into prepared pan and spread evenly.

14.

15. Bake for 30–35 minutes until golden and a toothpick inserted comes out clean.

16.

17. Allow cake to cool slightly.

18.

19. For the fudge topping, heat heavy cream and butter until steaming but not boiling.

20.

21. Pour hot cream mixture over chocolate and cocoa powder. Let sit 1 minute, then whisk until smooth and glossy.

22.

23. Spread chocolate fudge evenly over cooled cake.

24.

25. Whisk powdered sugar, milk, and vanilla together until smooth drizzle forms.

26.

27. Spoon vanilla drizzle over fudge topping.

28.

29. Allow topping to set slightly before slicing and serving.