Preheat oven at 180 degrees Grease and dust an 8"x4" or 9"x5" loaf tin or line it with baking parchment.

Cream butter and sugar with Vanilla or Butterscotch essence until.light and fluffy
Add in 1 egg at a time and beat.
Add half the Maziwa mala/Buttermilk and mix till incorporated

Sift in the flour mixture i.e dry ingredients in 3 parts and gently mix using a spatula.
Add the the rest of the maziwa mala alternatively till everything is mixed together

Add in the melted /Grated chocolate and mix well
Pour the batter into the prepared baking tin
Bake in the middle oven rack for 35-40 minutes or until a skewer inserted comes out clean and the cake begins to leave the edges..

Transfer to a wire rack and let cool to almost room temperature before slicing or it will crumble and not yield evenly sized slices!

Recipe Notes
You can replace the butter with 100 Ml flavourless cooking oil in which case you mix all the dry ingredients separately from the wet ones and mix alternately till combined. This may result in a more moist cake.