While I am not a fan of most "vegan" and "free-from" dishes (in this instance, gluten), this one is an exception. It is rich and moist and I think most people won't know it was lacking anything.
I've written the recipe for gluten-free, and put a "*" for items that you can get a vegan version if you like.
The original recipe can be found here:
https://www.ft.com/content/ec536a4c-8e61-11ea-a8ec-961a33ba80aa with thanks to Hanna-Johara Dokal.
Preparation Time: 10 minutes
Cooking Time: 40-45 minutes
Serves: 8
Chocolate Sponge
250g plain, gluten-free flour
2 tbsp cocoa powder
2 tsp baking powder
300g apple sauce
200g muscovado sugar
200g dark chocolate*
50g butter*
60g maple syrup
1 tsp vanilla extract
Almond butter icing
200g butter*
80 almond butter
1/2 tsp vanilla extract
Topping
Shredded almonds
* Get vegan alternatives if you want to cake to be vegan. Most dark chocolate is dairy-free, but double check.
1x 20cm baking tin
Pre-heat the oven to 160C / 320F / Gas mark 4
If you have apple sauce with chunks, blend it in a food processor until completely smooth.
Grease the baking tin
Sieve the flour, cocoa powder and baking powder in a large bowl. Stir together so they're evenly distributed.
In a bain-marie, slowly melt the sugar, chocolate, butter and maple syrup until smooth.
Pour the chocolate mix into the try ingredients, then add the apple sauce and vanilla extract. Whisk together until a pourable batter has formed.
Pour in the batter to the pre-greased baking tin. Make on the middle shelf for 40-45 minutes (until a metal skewer comes out clean)
While the cake is baking, whisk together all of the icing ingredients (add more sugar or some cornflour if the spread becomes too soft).
Once the cake has fully cooled, cut in half. Spread the icing liberally on one side of the cake and sandwich the other half of the cake on top. Sprinkle with shredded almonds.
If you can't find gluten-free flour, you can use gluten-free oats and process them until powdered, creating oat flour.