Chocolate Banana Cake

One of my mom's favourite! Since I will be going back for CNY, I thought I should start trying and make the best Chocolate Banana Cake for her!
This is my first trial...and we totally love it! (well probably a bit more cream next time!)

Ingredients:
Chocolate cake:
1/2 cup cocoa powder, sifted
3/4 cup strong espresso
2 tsp vanilla essence
300g self-raising flour
75g plain flour
1 1/2 tsp bicarbonate of soda
185g unsalted butter, softened
200g caster sugar
3 eggs
180g chocolate, melted and cooled

Banana and cream filling:
300ml whipping cream
3 ripe bananas

Chocolate topping:
284ml double cream
200g dark chocolate

Steps:
1. Preheat oven to 160C, and grease an 8 inch baking pan
2. Mix cocoa powder, coffee, vanilla essence and 1/2 cup cold water in a bowl and whisk.
3. Sift flour , bicarbonate of soda and a pinch of salt together.
4. Beat butter and sugar until light and fluffy. Add the eggs one at a time, beating well each time.
Stir in melted chocolate into egg mixture.
5. Add the flour and cocoa mixture alternatively into egg mixture.
6. Pour into pan and bake till set (approximately 1 - 1 1/2 hours).
7. Whip the whipping cream until thick. Cut the cake into 3 layers and spread the cream on each layer. Place the banana on each layer and cover it with the remaining cream.
8. Stack the cake back together. Heat the chocolate with double cream and pour it onto the combined cake. Let it cool for probably an hour in the fridge.