Chocolate Fudge Loaf Cake!

Name: Chocolate Fudge Loaf Cake!
Prep time: 30 min
Cook time: 1 h
Total time: 1 h 30 min
Cuisine: American
Ingredients: 175 g dark chocolate; 175 g unsalted butter; 2 tsps instant coffee; 100 ml boiling water; 135 g plain flour; 25 g cocoa powder; 1 tsp baking powder; 1/4 tsp bicarbonate of soda; 300 g light brown sugar ((or caster sugar)); 3 medium eggs; 75 ml buttermilk; 125 g unsalted butter ((room temp - not stork/spread)); 250 g icing sugar; 1/2 tsp vanilla ((optional)); 50-75 ml evaporated milk; Sprinkles; Chocolates