Cadburys Flake Traybake Cake Of The Century
This Cadburys chocolate flake traybake cake has to be one of my favourite recipes. Imagine sinking your teeth into a light, moist and fluffy orange-flavoured sponge, perfectly balanced with a rich chocolate custard coating. To top it all off, a generous amount of Cadbury’s 99 Flakes, adding that signature chocolatey goodness we all adore. Perfect for recipe for Easter, parties or bake sales.

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Ingredients
For the sponge
400 g Butter (softened or margarine)
500 g Caster Sugar
4 tsp Orange Essence
6 lrg Eggs
520 g Plain Flour
3 tsp Baking Powder
200 g Plain Greek Yoghurt
Chocolate Custard Coating
350 ml Whole Milk
300 g Caster Sugar
1 tbsp Golden Syrup
50 g Cocoa Powder (Sifted)
60 g Cornflour
50 g Butter
1 tsp Vanilla Essence (or orange essence)
Cadburys Flake Cake Recipe
STEP 1:
Grease and line your baking tray with baking paper, leaving enough so that it overhangs the baking tray. Heat the oven at 160°c fan/180c/350f/gas 4.
STEP 2:
Cream the butter, sugar and orange essence in with your electric mixer for 3 minutes, until pale and creamy. Add the eggs one at a time whilst mixing.
STEP 3:
In a separate bowl, mix the flour and baking powder. Pour half of this into your egg mixture and mix until combined. Pour in the greek yoghurt, mix again, and then add the remaining flour.
STEP 4:
Spoon the batter into your tray and smooth out evenly. Bake for 50 minutes or until the sponge is cooked. Leave to cook completely.
Chocolate Custard Coating
STEP 5:
In a bowl, combine the cornflour with 75ml cold water and whisk until smooth. Set aside.
STEP 6:
Combine the milk, caster sugar, golden syrup and cocoa powder in a medium sized saucepan, and warm over a medium heat, stirring occasionally using a hand whisk, until the mixture boils.
STEP 7:
Slowly pour the cornflour mixture into the saucepan, whisking continuously. Whisk over the heat for 2-3 minutes, until it thickens considerably. Allow to boil for 1 minute, then remove from the heat and stir in the butter and vanilla extract. Cover and leave to cool.
Assemble
STEP 8:
Add the chocolate custard coating on top of the sponge and spread out evenly with a spatula. Top with the cadburys flakes in rows.

Additional Extras
For the sponge I used orange essence but you can also add fresh orange zest if you want to. You can also add more orange essence or zest in the chocolate custard topping for more orange flavour.
Alternatives to a Cadburys 99 flake for the topping are grated dark or milk chocolate or a Cadburys Twirl Bar. There are many types of chocolate you could use, the possibilities are endless!
Top Tips
For the sponge, use a full-fat creamy greek yoghurt for best results. Alternatively you could use creme fraiche or coconut cream. If the alternative you are using is quite runny you may need to cook the cake for longer.
This chocolate flake traybake cake serves 18 people. Each serving gets 3 flakes on top of each cake. It is a generous size portion so you could make it go even further to serve about 25 people making it great cake for parties or large gatherings.
How To Store Cadbury Flake Traybake Cake
Cut into quarters or individual pieces and store in a air tight container. It will keep for up to 7 days. In hot weather keep in the fridge to keep cool.
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Cadburys Flake Traybake Cake Recipe
Equipment
Ingredients
For the sponge
- 400 g Butter (softened or margarine)
- 500 g Caster Sugar
- 4 tsp Orange Essence
- 6 lrg Eggs
- 520 g Plain Flour
- 3 tsp Baking Powder
- 200 g Plain Greek Yoghurt
Chocolate Custard Coating
- 350 ml Whole Milk
- 300 g Caster Sugar
- 1 tbsp Golden Syrup
- 50 g Cocoa Powder (Sifted)
- 60 g Cornflour
- 50 g Butter
- 1 tsp Vanilla Essence (or orange essense)
- 51 Cadburys 99 Chocolate Flakes
Instructions
- Grease and line your baking tray with baking paper, leaving enough so that it overhangs the baking tray. Heat the oven at 160°c fan/180c/350f/gas 4.
- Cream the butter, sugar and orange essence in with your electric mixer for 3 minutes, until pale and creamy. Add the eggs one at a time whilst mixing.
- In a separate bowl, mix the flour and baking powder. Pour half of this into your egg mixture and mix until combined. Pour in the greek yoghurt, mix again, and then add the remaining flour.
- Spoon the batter into your tray and smooth out evenly.
- Bake for 50 minutes or until the sponge is cooked. Leave to cook completely.
Chocolate Custard Coating
- In a bowl, combine the cornflour with 75ml cold water and whisk until smooth. Set aside.
- Combine the milk, caster sugar, golden syrup and cocoa powder in a medium sized saucepan, and warm over a medium heat, stirring occasionally using a hand whisk, until the mixture boils.
- Slowly pour the cornflour mixture into the saucepan, whisking continuously. Whisk over the heat for 2-3 minutes, until it thickens considerably. Allow to boil for 1 minute, then remove from the heat and stir in the butter and vanilla extract. Cover and leave to cool.
Assemble
- Add the chocolate custard coating on top of the sponge and spread out evenly with a spatula. Top with the cadburys flakes in rows.



No-one liked the custard on top, it was too sweet even though I halved the amount I put in. The cake part of it is excellent. I really liked it and the flavour.
Thank you for your feedback and I’m glad you liked the sponge.
The moment the moist sponge hit my lips I knew this was the cake for me. Yum yum. Give it a go you won’t regret it!
Absolutely sensational! Goes well with a nice cup of tea!