Mermaid Cake
Learn to bake a mesmerizing mermaid cake with easy-to-find ingredients. Featuring moist vanilla cake layers, silky buttercream, and shimmering mermaid scales, this stunning dessert is perfect for birthdays and themed celebrations.
Prep Time 45 minutes mins
Cook Time 30 minutes mins
Total Time 3 hours hrs 45 minutes mins
Course Dessert
Cuisine American
Servings 15
Calories 400 kcal
Round cake pans, stand mixer, mixing bowls, measuring cups, measuring spoons, offset spatula, bench scraper, piping bags, Wilton #5 or #6 piping tips, wire cooling rack, serrated knife, silicone seashell molds, microwave-safe bowl, cake turntable
Cake Layers
- 2½ cups all-purpose flour
- 1½ cups granulated sugar
- 1 tbsp baking powder
- ½ tsp salt
- 1 cup unsalted butter softened
- 4 large eggs
- 1 cup whole milk
- 2 tsp pure vanilla extract
Buttercream
- 1 cup unsalted butter
- 4 cups confectioners' sugar
- ¼ cup heavy cream
- 1 tsp vanilla extract
- Pinch of salt
Decorations
Turquoise gel food coloring
Sky blue gel food coloring
Lavender gel food coloring
Soft pink gel food coloring
White chocolate
Sugar pearls
Edible glitter
Sprinkles
Instructions
Preheat oven to 350°F (175°C).
Grease and line cake pans with parchment paper.
Cream butter and sugar until light and fluffy.
Add eggs one at a time, then vanilla.
Alternate adding dry ingredients and milk.
Divide batter between pans.
Bake for 25–30 minutes.
Cool completely on wire racks.
Beat butter for buttercream until creamy.
Add confectioners' sugar gradually.
Mix in cream, vanilla, and salt.
Divide and color buttercream into ocean-inspired shades.
Level cake layers and stack with buttercream.
Apply a crumb coat and chill for 20 minutes.
Cover cake with blue buttercream.
Pipe overlapping scales using colored buttercream.
Create white chocolate seashells and attach to cake.
Finish with pearls, glitter, and sprinkles.
- Use gel food coloring for vibrant colors without thinning buttercream.
- Chill the cake before piping scales for cleaner results.
- White chocolate shells can be prepared up to one week ahead.
- Practice piping scales on parchment paper before decorating.
Storage
Store covered in the refrigerator for up to 3 days. Bring to room temperature 30–45 minutes before serving.
Nutrition (per serving)
- Calories: 400 kcal
- Carbohydrates: 45 g
- Protein: 4 g
- Fat: 22 g
- Saturated Fat: 13 g
- Sugar: 35 g
- Sodium: 180 mg
Suitable For
Birthday Parties, Mermaid Parties, Baby Showers, Ocean-Themed Celebrations, Children's Events.
Keyword mermaid cake, mermaid birthday cake, ocean themed cake, under the sea cake, mermaid tail cake, birthday cake, buttercream cake, themed cake, celebration cake