Chocolate Fingers Cake

Name: Chocolate Fingers Cake
Prep time: 20 min
Total time: 20 min
Cuisine: American
Ingredients: 220 g (1 and 3/4 cups) plain flour; 350 g (1 and 3/4 cups) caster sugar (superfine sugar); 65 g (3/4 cup) cocoa powder; 1 tsp baking powder; 2 tsp bi-carbonate soda; 1 tsp salt; 250 g (1 cup) buttermilk; 125 g (1/2 cup) vegetable oil; 2 eggs; 1 tsp vanilla extract; 250 g coffee (2 espresso shots or 3 tsp coffee granules mixed with 250g water); 250 g unsalted butter; 360 g icing sugar; 65 g (3/4 cup cocoa powder; 45 g milk; 1/2 tsp salt; 800 g chocolate finger biscuits (I used Cadbury brand (or replace with Kit Kats)); your choice of chocolates and lollies