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    Home » Recipes » Cakes

    Harry Potter's Birthday Cake

    Published: July 30, 2021 | Last Modified: August 8, 2022 by Gail Ng | 2 Comments

    JUMP TO RECIPE PRINT RECIPE

    This is a very special cake from the Harry Potter books that is very dear to me and my childhood that I've always wanted to make. This iconic chocolate cake is Harry Potter's birthday cake that he received from Hagrid on his 11th birthday.

    'Anyway - Harry,' said the giant, turning his back on the Dursleys, 'a very happy birthday to yeh. Got summat fer yeh here - I mighta sat on it at some point, but it'll taste all right.'

    From an inside pocket of his black overcoat he pulled a slightly squashed box. Harry opened it with trembling fingers. Inside was a large, sticky chocolate cake with Happy Birthday Harry written on it in green icing.

    Harry Potter and the Philosopher's Stone
    Pink cake with ‘Happy Birthday Harry’ written in green icing

    As a book loyalist, one of my pet peeves about the first Harry Potter movie was how they implied that Hagrid couldn't spell. If you're familiar with the iconic pink birthday cake with green icing shown in the movie, you will have probably noticed that the writing on the cake reads "Happee Birthdae Harry" instead of what was actually originally written in the book.

    The book's description of the cake also never mentioned the colour of the cake, only the green icing. I loved the movie's rendition of the pink frosting but with the book's spelling. And that's how I ended up with this version of Harry's cake!

    This rendition of Harry Potter's 11th birthday cake has soft and fluffy buttermilk chocolate cake layers, creamy chocolate ganache, pink cream cheese frosting, and green lettering. It's not too sweet due to the dark chocolate but decadent enough thanks to the layers of ganache. It made me so incredibly happy decorating and eating it and I hope it makes you feel the same way! Happy birthday Harry!

    Two slices of chocolate cake cut from Harry Potter’s birthday cake

    How to make Harry Potter's birthday cake

    Prep oven & cake pans: Preheat oven to 350°F and line the bottoms of three 6” cake pans with parchment paper rounds. Set aside.

    Mix dry ingredients: In a large mixing bowl, stir together flour, brown sugar, granulated sugar, cocoa powder, espresso powder, baking soda, and salt. Set aside.

    Add wet ingredients to dry: In a separate large bowl, whisk together melted butter, oil, eggs, and buttermilk until the eggs have broken up. Pour this into the bowl of dry ingredients and mix on low speed with a hand mixer until mostly combined.

    Mix in hot water: With the mixer on low speed, slowly stream in hot water and mix until batter is smooth and glossy. Don't overmix.

    Mixing chocolate cake batter in bowl

    Bake cakes: Divide batter into cake pans until about ⅓ full. Bake cakes for 35-40 minutes or until a toothpick inserted in the middle comes out mostly clean. Let cakes cool for 10-15 minutes before running a knife around the edges of each cake pan and flipping them out onto a wire rack.

    Level cakes: Remove the parchment paper and let cool completely. With a serrated knife, cut off the domed tops of each cake layer until each layer is flat and about the same height.

    Three chocolate cake layers before and after baking

    Heat cream: In a small pot or microwave, heat the whipping cream just until it comes to a simmer. Pour over the chopped chocolate in a small bowl and let sit undisturbed for about 2 minutes. 

    Stir ganache: Stir the ganache until the chocolate has all melted and combined with the cream to create a glossy and thick ganache. Let ganache cool for about 10 minutes to thicken into a spreadable consistency.

    Pouring heavy cream over chocolate to make ganache

    Assemble cake: Place one cake layer down on a turntable. With an offset spatula, spread a thick layer of ganache on top of the cake layer and smooth to the edges. Place the second cake layer on top and repeat.

    Spreading chocolate ganache on cake and stacking cake layers

    Make cream cheese frosting: In a mixing bowl, use a hand mixer to beat softened cream cheese until smooth. Add in whipping cream, powdered sugar, and vanilla extract and beat until smooth and creamy, about 3-5 minutes. 

    Add food colouring: Divide out a small amount of frosting into a small bowl. Add pink food gel to the larger amount of frosting and green food gel to the small bowl. Stir until thoroughly mixed.

    Whipping cream cheese frosting with beater

    Frost cake: With an offset spatula, spread a thin layer of pink frosting on the sides and top of the cake as a crumb coat. Chill cake in the fridge for about 30 minutes. Finish frosting the cake by spreading a thick layer of pink frosting all around the cake and smoothing the sides with a bench scraper. This doesn't have to be perfect! Transfer the green frosting to a piping bag and cut the tip off. Pipe 'Happy Birthday Harry' on the top of the cake. 

    Frosting Harry Potter birthday cake with pink frosting and lettering with green frosting

    Frequently Asked Questions

    How to store chocolate cake?

    This cake can be stored wrapped in plastic wrap or in a cake container in the fridge for 3-5 days.

    Can you freeze chocolate cake?

    Yes, you can freeze leftovers of this cake. Wrap them well in plastic wrap and freeze for up to 1 month. Thaw in the fridge overnight before eating.

    Can you make Harry Potter's birthday cake ahead of time?

    Yes, you can make the chocolate cake layers in advance and store them in the fridge for 1-2 days or freeze them for up to 1 month before assembling the cake. The chocolate ganache and cream cheese frosting should be made fresh on the day you assemble the cake.

    Can you make a different frosting for Harry Potter's birthday cake?

    Absolutely! The book does not describe what the actual frosting is so you can also use American buttercream or Swiss meringue buttercream instead of cream cheese frosting. Just add the same pink food gel colouring to the frosting.

    Chocolate birthday cake with slice cut out of it

    Other layer cake recipes to try

    • Tiramisu Layer Cake
    • Earl Grey Lemon Cake
    Pink cake with ‘Happy Birthday Harry’ written in green icing

    Harry Potter's Birthday Cake

    Author: Gail Ng
    This nostalgic rendition of Harry Potter’s 11th birthday cake features moist and fluffy chocolate cake, chocolate ganache layers, pink cream cheese frosting, and green lettering to take you back to the first time you read the books.
    5 from 4 votes
    PRINT RECIPE PIN RECIPE
    Prep Time 1 hr 30 mins
    Cook Time 45 mins
    Total Time 2 hrs 15 mins
    Yield 1 6” cake
    Category Desserts
    Cuisine American

    Ingredients
      

    Chocolate Cake

    • 200 g all-purpose flour
    • 100 g brown sugar
    • 100 g granulated sugar
    • 75 g cocoa powder
    • 1 teaspoon espresso powder
    • 1 ½ teaspoons baking soda
    • ½ teaspoon salt
    • 115 g unsalted butter, melted
    • 100 g flavourless oil
    • 2 large eggs, room temperature
    • 225 g buttermilk
    • 120 g hot water

    Chocolate Ganache

    • 150 g dark chocolate, roughly chopped
    • 200 g whipping cream

    Cream Cheese Frosting

    • 250 g cream cheese, softened
    • 125 g whipping cream
    • 75 g powdered sugar
    • 1 teaspoon vanilla extract
    • pink and green food gel

    Instructions
     

    Chocolate Cake

    • Preheat oven to 350°F and line the bottoms of three 6” cake pans with parchment paper rounds. Set aside.
    • In a large mixing bowl, stir together flour, brown sugar, granulated sugar, cocoa powder, espresso powder, baking soda, and salt. Set aside.
    • In a separate large bowl, whisk together melted butter, oil, eggs, and buttermilk until the eggs have broken up. Pour this into the bowl of dry ingredients and mix on low speed with a hand mixer until mostly combined.
    • With the mixer on low speed, slowly stream in hot water and mix until batter is smooth and glossy. Don't overmix.
    • Divide batter into cake pans until about ⅓ full.
    • Bake cakes for 35-40 minutes or until a toothpick inserted in the middle comes out mostly clean.
    • Let cakes cool for 10-15 minutes before running a knife around the edges of each cake pan and flipping them out onto a wire rack. Remove the parchment paper and let cool completely. With a serrated knife, cut off the domed tops of each cake layer until each layer is flat and about the same height.

    Chocolate Ganache

    • In a small pot or microwave, heat the whipping cream just until it comes to a simmer. Pour over the chopped chocolate in a small bowl and let sit undisturbed for about 2 minutes. 
    • Stir the ganache until the chocolate has all melted and combined with the cream to create a glossy and thick ganache. Let ganache cool for about 10 minutes to thicken into a spreadable consistency.
    • Place one cake layer down on a turntable. With an offset spatula, spread a thick layer of ganache on top of the cake layer and smooth to the edges. Place the second cake layer on top and repeat.

    Cream Cheese Frosting

    • In a mixing bowl, use a hand mixer to beat softened cream cheese until smooth. Add in whipping cream, powdered sugar, and vanilla extract and beat until smooth and creamy, about 3-5 minutes. 
    • Divide out a small amount of frosting into a small bowl. Add pink food gel to the larger amount of frosting and green food gel to the small bowl. Stir until thoroughly mixed.
    • With an offset spatula, spread a thin layer of pink frosting on the sides and top of the cake as a crumb coat. Chill cake in the fridge for about 30 minutes.
    • Finish frosting the cake by spreading a thick layer of pink frosting all around the cake and smoothing the sides with a bench scraper. This doesn't have to be perfect!
    • Transfer the green frosting to a piping bag and cut the tip off. Pipe 'Happy Birthday Harry' on the top of the cake. 

    Nutrition

    Calories: 6820kcal | Carbohydrates: 570g | Protein: 88g | Fat: 491g | Saturated Fat: 244g | Polyunsaturated Fat: 30g | Monounsaturated Fat: 179g | Trans Fat: 4g | Cholesterol: 1324mg | Sodium: 4191mg | Potassium: 3649mg | Fiber: 47g | Sugar: 328g | Vitamin A: 11914IU | Vitamin C: 2mg | Calcium: 1118mg | Iron: 41mg
    Keywords chocolate cake, Harry Potter birthday cake, Harry Potter’s birthday cake
    Tried this recipe?Leave a comment & rating to let us know how it was and tag your Instagram posts with @teakandthyme!

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    1. Christina

      August 24, 2021 at 7:52 am

      Hi there! I've been trying to find out why there are squiggly cuts in the icing. I can't seem to remember. Do you know?

      Reply
      • Gail Ng

        August 24, 2021 at 8:05 am

        Hagrid said he sat on the cake at some point so I'm quite sure it's just the result of being roughed up in his pocket during his trip to Harry or a baking/decorating mishap since he said he baked it himself!

        Reply

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