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My little ones love Harry Potter, and now our first Harry Potter birthday party is coming up. What absolutely can't be missing? That’s right: a Harry Potter birthday cake! And to celebrate, I’m letting my little ones "repot mandrakes"...
Ever since we read the first book of Harry Potters, my kids – unsurprisingly – have been completely enchanted by the magical world of the young wizard.
After dressing up as “Hermione Granger” for Halloween, it was only a matter of time before our first Harry Potter birthday party came around. And now the time has come: my little one wished for a Harry Potter-themed birthday! Once it was clear that she didn’t want to serve her guests Harry Potter cupcakes (we made those for the school carnival), but rather a cake, we knew it had to be a Mandrake Cake.
The Mandrake Cake, along with various other Harry Potter party snacks, made a magical centerpiece on the birthday table for my little one’s Harry Potter party! A truly magical feast!

Recipe for the Harry Potter Birthday Cake
This magical cake is made of a rich, moist chocolate base and topped with quirky little caramel mandrakes. I baked the cake as a Harry Potter birthday cake without my little ones this time – but I’m sure they would have had an absolute blast shaping those cheeky mandrakes themselves!

Ingredients for the Mandrake Chocolate Cake
Chocolate Cake
- 250 g soft butter
- 150 g sugar
- 4 eggs
- 250 ml milk
- 280 g spelled flour
- 80 g baking cocoa
- 1/2 packet of baking powder (7 g)
- 1 pinch of salt
- 200 g chocolate shavings or mini chocolate chips
Decoration
- 24 soft caramel candies
- 12 basil or parsley leaves (for the mandrake "tops")
Baking accessories
Kitchen scale, Mixing bowl, Hand mixer, Measuring jug, Rubber spatula, Rectangular baking pan (or a 26 cm round springform pan), Baking paper, Cooling rack, Spoon or piping bag, Sharp kitchen knife, Wooden skewer

Preparation
For the Harry Potter birthday cake, we need a rich, moist chocolate base and some adorable little mandrakes. You can shape the mandrakes 1–2 days in advance. If you do, I recommend sealing them airtight in plastic wrap or a sealed container. Only add the green "hair" – the parsley – on the day you serve the cake, to keep it fresh and perky.
How to shape the mandrakes
To model the mandrakes, I used two soft caramel candies per mandrake. They need to be kept cool as long as possible, since they soften easily at room temperature. But the good thing is: most kids love the taste. You could also use fondant, which holds its shape better – but in my experience, kids aren’t always fans of the taste.
- Knead two soft caramels together to form a smooth ball.
- Roll the ball into a small log and pinch one end into a point.
- With a sharp knife, cut out little arms and legs.
- Carefully shape them with your fingers so they become a bit longer and rounded. Use a wooden skewer to press in: Eye, a mouth, a little hole on top of the head (I even gave mine a belly button – just for fun 😉)
- Finally, right before placing the mandrakes on the cake, stick a parsley leaf into the hole on top of the head – and voilà: your magical mandrake is ready!






How to Bake the Chocolate Cake
- First, preheat your oven to 175°C (top and bottom heat / 350°F).
- Using a hand mixer, cream the butter until light and fluffy.
- Add the sugar and keep mixing until it has dissolved well into the butter.
- Now, add the eggs one at a time, mixing each one thoroughly into the butter-sugar mixture.
- In the next step, add the cocoa powder, flour, baking powder, and salt to the batter and mix until combined.
- Finally, pour in the milk and chocolate shavings, and mix everything into a smooth batter.
- Pour the batter into your parchment-lined baking tin. Bake your Harry Potter birthday cake-to-be for about 30–35 minutes. Don’t forget the toothpick test: insert a wooden skewer into the center of the cake – if it comes out clean, it’s done! (Every oven bakes a little differently.)
- Once the cake is done: Let it cool in the pan for 5 minutes. Then carefully remove it and let it cool completely on a wire rack.
From Chocolate Cake to Mandrake Cake
For our Harry Potter birthday cake, the chocolate cake becomes a flower bed for the mandrakes!
- To make the cake look like a flowerbed, I trimmed about 1 cm off the top and sides of the cake and crumbled those pieces into “soil.”
- In the next step, I used a piping tip to twist little holes into the cake, one for each mandrake. The cake crumbs from these holes were also saved to use as additional “soil.”
- Now you can plant the mandrakes into the holes, and then sprinkle the crumbly cake bits all over the top, so it looks like loose garden soil.
- And there you have it: our magical Mandrake Birthday Cake – straight out of the Hogwarts greenhouse!


Preparation in pictures









he Mandrake Cake Was a HUGE Hit! The Mandrake Cake was a huge success with the kids! They had so much fun "pulling out mandrakes" – and only had one idea for improvement: It would be an absolute highlight if the mandrakes actually screamed when pulled out! If you’ve got a fun idea on how to make that happen, feel free to share it in the comments – I’d love to hear it! 😊
Wishing you lots of fun baking – and even more fun celebrating your magical Harry Potter birthday party!
Yours, Lia
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