Giant Jaffa Cake

What else is there to say" Jaffa cakes are already amazing but make it a giant version and it is just incredible. I love this version and it is so fantastic, super easy to make and a very delicious Thermomix recipe to try at home. You could easily use this recipe to make the normal Jaffa cake in its usual shape if there are no giants coming for tea. 
The base is a genoise sponge which is super easy to prepare and. great way to also make sponge fingers. It takes a little while to cream the eggs but, believe me, it is worth it. Instead of the orange juice you could also opt for passionfruit juice which tastes incredible. For this recipe I use my wonderful push pan cake tin and reusable cake liners because they are super practical and I can simply wash them and use again and again. 
Genoise Sponge

4 large eggs
120 g caster sugar
1 tsp vanilla bean paste (or vanilla extract)
120 g plain flour
1 tsp baking powder
1 pinch salt

Filling

400 g orange juice (or passionfruit juice)
8 gelatine leaves (or 25g gelatine powder)
20 g caster sugar (optional)

Topping

200 g dark chocolate (in small chunks)

Preheat the oven to 180C / 160C Fan / Gas Mark 4. Line a 20cm push pan cake tin with reusable cake liners or greaseproof paper. 

For the sponge, insert the whisk attachment in the mixing bowl. Crack in the eggs, add caster sugar and vanilla extract. Whisk 6 Min. / 37C / Speed 4.

Whisk again 6 Min. / Speed 4.

Add the pla...