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Homemade Harry Potter birthday cake with pink frosting and green icing.

Harry Potter Birthday Cake Recipe

Elisa
Learn how to make an authentic Harry Potter birthday cake with rich chocolate layers, pink buttercream, and whimsical green lettering. Perfect for fans of all ages!
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Prep Time 20 minutes
Cook Time 30 minutes
Total Time 50 minutes
Course Dessert
Cuisine American
Servings 12 slices
Calories 450 kcal

Ingredients
  

  • 1 box chocolate cake mix plus ingredients listed on the box
  • 2 cups pink buttercream frosting homemade or store-bought, dyed pink
  • 1 tube green decorating gel
  • Cooking spray or butter for greasing pans

Instructions
 

  • 1. Preheat your oven to 350°F (175°C). Grease two 8-inch round cake pans and line the bottoms with parchment paper.
  • 2. Prepare the chocolate cake batter according to box directions or your favorite homemade recipe.
  • 3. Divide the batter evenly between the pans and bake for 25-30 minutes, or until a toothpick inserted into the center comes out clean.
  • 4. Let cakes cool in the pans for 10 minutes, then transfer to a wire rack to cool completely.
  • 5. Once cooled, place one cake layer on a plate or cake board. Spread a generous layer of pink buttercream frosting on top.
  • 6. Add the second cake layer and frost the entire cake with the remaining pink buttercream, smoothing it with an offset spatula.
  • 7. Using green decorating gel, pipe the message "HAPPEE BIRTHDAE HARRY" across the top of the cake.
  • 8. Chill the cake for about 30 minutes if needed before serving to set the frosting and writing.

Notes

Flavor Variations: Swap chocolate for vanilla, red velvet, or even pumpkin spice cake for a fun twist.
Homemade Frosting Tip: Beat 1 cup butter with 3-4 cups powdered sugar, 2-3 tablespoons milk, and pink food coloring for a quick homemade buttercream.
Decoration Tip: Writing with green icing can feel tricky, but don’t overthink it — the charm is in the messiness. If you’re feeling unsure, a quick doodle on parchment paper can help build confidence.

Nutrition

Serving: 1sliceCalories: 450kcalCarbohydrates: 56gProtein: 44gFat: 24gSaturated Fat: 10gCholesterol: 60mgSodium: 370mgFiber: 1gSugar: 35g
Keyword chocolate birthday cake, easy birthday cake, Hagrid birthday cake, Harry Potter birthday cake, Harry Potter cake recipe, Harry Potter party dessert, homemade birthday cake, magical birthday cake, pink frosting cake, themed cake recipes
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