Banana Boston Cream Cake

A fantastic recipe; this chocolate covered banana cake is filled with homemade custard - and tastes amazing. A nice fruity, indulgent version of the traditional Boston Cream Pie. Takes a good few hours, but is definately worth it!

 Ingredients

For the Sponge

100g Unsalted Butter, Softened

150g Caster Sugar

2 Large Eggs, Beaten and at room temperature

2 Very Ripe Bananas, Mashed

125g Soured Cream

1tsp Vanilla Extract

300g Plain Flour

1/2tsp Salt

3/4tsp Baking Powder

1tsp Bicarbonate of Soda

For the Custard

250ml Whole Milk

1tsp Vanilla Extract

3 Egg Yolks

50g Caster Sugar

15g Plain Flour

15g Cornflour

For the Dark Chocolate Ganache

150g Good Quality Dark Cooking Chocolate, Chopped

150ml Whipping/Double Cream

To Decorate (Optional)

20g White Cooking Chocolate

20g Dark Cooking Chocolate

5g Margarine

1 Digestive Biscuit, Crushed

Method

1. Preheat the oven to 170C/150C fan/Gas 3, and line or grease two 20cm sandwich tins.

2. Using a free-standing mixer, cream the butter and sugar until it turns a cream colour. Slowly add a bit of the beaten eggs, mixing well after each addition.

3. In a jug, mix the mashed bananas, soured cream and vanilla, and then slowly add to the mixer on a low speed, making sure everything is incorporated. At this point it may curdle, but don't worry.

4. Sieve in all of the dry ingredients, and fold in with a spatula until even and smooth. Split between the two tins, and bake for about 25-35 minutes, or until a toothpick placed in the center of the cake comes out clean. Once baked, take them out of the tins after 10 minutes of cooling time, and then leave on a wire rack to cool fully.

5. Whilst the cakes are baking, prepare the custard. Heat the milk and vanilla extract in a saucepan and a medium-low heat until it boils. Meanwhile mix the yolks, sugar and flours to form a paste. Pour a bit of the warmed milk onto the paste and mix. Place paste into the saucepan, and put on a medium heat. Whisk for about 4-5 minutes, or until it properly thickens up and is smooth - but no longer or the eggs will scramble. Pour onto a baking tray and cover with cling film - this will stop a skin from forming. Leave to cool.

6. As the cakes are cooling, prepare the ganache. Do this by heating the cream in a saucepan until it's almost boiling and then pour on top of the chocolate, mixing until its all melted, and a smooth and glossy ganache is formed. Set aside to cool. 

7. Once the cakes are cool, using a hand mixer, whisk the custard until smooth. Then spread the custard on top of one of the cakes with a palette knife, and place the other cake on top. Wrap the sides tightly with cling film, and place in the fridge for 40 minutes so the custard sets.

8. Whilst the cake is setting, make the chocolate curls. Melt the two chocolates separately, the dark with 3g of margarine, and the white with 2g. Pour into a lined ramekin, and swirl with a toothpick. Place in the fridge until completely set, and then remove the block of chocolate, and (with cold hands) use a swivel bladed vegetable peeler to peel off curls. This step may take a few attempts, and a few times you might have to put the block in the fridge for a bit before carrying on. Place the finished curls in the fridge until needed. 

9. Once the cake has set, take off the cling film, and place on a wire rack with a plate underneath. Pour the ganache on top and smooth out with a palette knife around the sides. Leave for a while, and then before the ganache has completely set, place your biscuit crumbs and curls however you want.

Enjoy :)