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Glowing Core Cake

Glowing Core Cake

This Glowing Core Cake is a rich dark chocolate cake with a surprise UV-reactive neon filling that glows under blacklight! Perfect for parties and special occasions, this eye-catching dessert combines delicious flavor with a stunning visual effect.
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Prep Time 30 minutes
Cook Time 30 minutes
Total Time 1 hour
Course Dessert
Cuisine American
Servings 12 slices
Calories 480 kcal

Equipment

Ingredients
  

  • 2 cups all-purpose flour
  • 3/4 cup unsweetened cocoa powder dark or black cocoa for deep color
  • 2 tsp baking soda
  • 1 tsp baking powder
  • 1/2 tsp salt
  • 1 cup unsalted butter softened
  • 1 3/4 cups granulated sugar
  • 3 large eggs
  • 1 tbsp vanilla extract
  • 1 cup buttermilk
  • 1/2 cup hot coffee enhances chocolate flavor
  • 1 cup tonic water UV-reactive ingredient for glowing filling
  • 8 oz cream cheese softened, for filling
  • 2 cups powdered sugar for filling
  • 1 tsp vanilla extract for filling
  • 1/4 tsp vitamin B2 powder optional, enhances UV glow
  • 5 colors neon food coloring pink, green, blue, yellow, and purple
  • 3 cups buttercream frosting for decorating

Instructions
 

  • Preheat the oven to 350°F (175°C) and grease two 8-inch cake pans.
  • In a mixing bowl, whisk together the flour, cocoa powder, baking soda, baking powder, and salt. Set aside.
  • In another bowl, beat the butter and sugar with an electric mixer until light and fluffy.
  • Add the eggs one at a time, mixing well after each addition, then stir in the vanilla extract.
  • Gradually add the dry ingredients, alternating with buttermilk and hot coffee, mixing until just combined.
  • Divide the batter evenly between the prepared cake pans and smooth the tops.
  • Bake for 28-30 minutes, or until a toothpick inserted into the center comes out clean.
  • Let the cakes cool in the pans for 10 minutes, then transfer to a cooling rack to cool completely.
  • For the glowing filling, beat the cream cheese, powdered sugar, vanilla extract, and tonic water until smooth.
  • Divide the filling into separate bowls and tint each with a different neon food coloring.
  • To assemble, cut out the center of one cake layer, leaving about a 1-inch border.
  • Fill the hollowed center with alternating neon-colored frosting layers.
  • Place the second cake layer on top and frost the entire cake with buttercream.
  • Chill the cake for at least 30 minutes before slicing under blacklight to reveal the glowing core!

Notes

  • Storage: Keep refrigerated for up to 5 days. Bring to room temperature before serving.
  • UV Effect: Tonic water and vitamin B2 enhance the glow under blacklight. For the best effect, use a strong UV light.
  • Extra Decoration: Add neon-colored piping or edible glitter for an even more dazzling effect.

Nutrition

Serving: 1sliceCalories: 480kcalCarbohydrates: 65gProtein: 6gFat: 22gSaturated Fat: 13gPolyunsaturated Fat: 1gMonounsaturated Fat: 5gCholesterol: 90mgSodium: 260mgPotassium: 120mgFiber: 3gSugar: 50gVitamin A: 600IUCalcium: 80mgIron: 2mg
Keyword Blacklight Cake, Dark Chocolate Cake with Neon Filling, Glowing Core Cake, Neon Dessert, UV-Reactive Cake
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