Cakes

Mermaid Cake with Sand and Seashells

By Callie:

Everyday Culinary Delights👩‍🍳

princess cake sand

Transport your guests to a magical under-the-sea adventure with this Mermaid Cake with Sand and Seashells! This ocean-inspired sheet cake features a sandy beach made from crushed cookies, delicate fondant seashells, and a whimsical fondant mermaid tail for the perfect touch of fantasy. Whether you’re celebrating a birthday, baby shower, or just a love for all things mermaid, this cake is sure to impress.

Why You’ll Love This Recipe

Key Benefits

  • Easy to Decorate: No advanced cake decorating skills required! Simple fondant work and cookie crumbs make this cake stunning yet beginner-friendly.
  • Perfect for Beach-Themed Parties: This cake fits beautifully into mermaid, ocean, or tropical party themes.
  • Customizable: Change up the colors, decorations, or flavors to fit your vision.

Taste & Texture

  • Moist and Fluffy Cake: A soft, buttery cake base that pairs perfectly with creamy frosting.
  • Crunchy “Sand”: The crushed cookies add a satisfying texture contrast.
  • Sweet and Smooth Fondant: The fondant decorations not only look amazing but add a slight chewiness to the mix.

Dietary Attributes

  • Can be made gluten-free by using gluten-free flour and cookies.
  • Easily adaptable for dairy-free or egg-free diets with the right substitutions.

Ingredients & Substitutions

For the Cake:

  • 2 ½ cups all-purpose flour (or gluten-free 1:1 flour)
  • 2 ½ tsp baking powder
  • ½ tsp salt
  • 1 cup unsalted butter, softened
  • 1 ¾ cups granulated sugar
  • 4 large eggs
  • 2 tsp vanilla extract
  • 1 cup whole milk (or almond milk for dairy-free)

For the Buttercream Frosting:

  • 1 cup unsalted butter, softened
  • 4 cups powdered sugar
  • 2-3 tbsp heavy cream (or coconut milk for dairy-free)
  • 1 tsp vanilla extract
  • A few drops of blue and teal food coloring

For the Decorations:

  • 1 ½ cups crushed vanilla wafer cookies (for the sand effect)
  • Fondant in pastel colors (purple, teal, pink)
  • Edible pearl sprinkles
  • Gold luster dust (optional, for a shimmering effect)

Step-by-Step Instructions

  • Prepare the Cake Batter
    Preheat your oven to 350°F (175°C) and grease a 9×13-inch sheet cake pan. In a bowl, whisk together flour, baking powder, and salt. In a separate bowl, cream butter and sugar until light and fluffy. Beat in the eggs one at a time, then stir in vanilla. Gradually add the dry ingredients, alternating with the milk, until the batter is smooth.
princess cake sand
  • Bake the Cake
    Pour the batter into the prepared pan and bake for 30-35 minutes or until a toothpick inserted in the center comes out clean. Allow the cake to cool completely before decorating.
  • Make the Buttercream Frosting
    Beat the softened butter until creamy. Gradually add powdered sugar, mixing well. Stir in vanilla extract and heavy cream until the frosting reaches a smooth consistency. Divide the frosting into two bowls and tint one portion blue and the other teal for a wave-like effect.
  • Frost the Cake
    Spread the blue and teal frosting onto the cooled cake, blending them to create an ombre ocean look.
  • Create the Sand and Seashells
    Sprinkle crushed vanilla wafer cookies over one side of the cake to resemble sand. Use fondant to mold seashells and a mermaid tail, then place them strategically on the cake. Add edible pearl sprinkles for an extra touch of ocean magic.

Expert Tips & Tricks

Best Practices

  • Chill the cake before frosting to make it easier to spread the buttercream.
  • Use a spatula or piping bag to create textured ocean waves in the frosting.

Common Mistakes

  • Avoid overmixing the batter, as it can make the cake dense instead of fluffy.
  • Don’t use warm cake for decorating, or the buttercream will melt.

Time-Saving Tips

  • Prepare the fondant decorations a day ahead and store them in an airtight container.
  • Use store-bought sugar pearls and edible glitter for quick enhancements.

Serving Suggestions

Pairings

Presentation Ideas

  • Arrange the cake on a blue or sand-colored cake stand for a full beach effect.
  • Scatter edible shells and gold-dusted fondant pieces around the serving platter.

Beverage Pairings

  • Serve with coconut lemonade or a tropical punch for a beachy vibe.
  • Complement the flavors with a vanilla milkshake or a light white wine for adults.

Storage & Reheating

Leftover Storage

  • Store the cake in an airtight container at room temperature for up to 2 days.
  • Refrigerate for longer freshness, up to 5 days.

Reheating Methods

  • If refrigerated, allow the cake to come to room temperature before serving to maintain the best texture.

Frequently Asked Questions

Substitutions & Adjustments

  • Can I use a cake mix instead of homemade batter? Yes, a vanilla or funfetti cake mix works great as a shortcut.
  • What if I don’t have fondant? Try molding seashells out of white chocolate or using candy decorations.

Troubleshooting

  • Why is my cake dry? This can happen if it’s overbaked. Check for doneness a few minutes before the suggested baking time.
  • My buttercream is too runny. Add more powdered sugar to thicken it, or chill it for 10 minutes.

Variations & Customizations

Dietary Adaptations

  • To make it vegan, use dairy-free butter, almond milk, and a flax egg substitute.
  • For a gluten-free version, swap out regular flour for gluten-free all-purpose flour.

Flavor Twists

  • Add coconut or almond extract to the batter for a tropical taste.
  • Mix crushed freeze-dried berries into the frosting for a fruity burst.

Seasonal/Holiday Versions

  • For a winter mermaid cake, use icy blue and silver decorations.
  • Make a Halloween version by using black, purple, and green fondant details for a spooky sea theme.

Conclusion

This Mermaid Cake with Sand and Seashells is a show-stopping dessert that will bring a touch of magic to any celebration. With its ocean-inspired frosting, edible sand, and enchanting fondant details, it’s as fun to make as it is to eat. Whether you’re hosting a birthday party or a summer gathering, this cake will transport your guests straight to an underwater paradise. If you try this recipe, share your photos and tag us on Pinterest

For more stunning cakes, check out these must-try recipes:

Happy baking, and don’t forget to share your mermaid cake creations with us!

Mermaid Cake with Sand & Seashells
Mermaid Cake with Sand & Seashells
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princess cake sand

Mermaid Cake with Sand and Seashells


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  • Author: Callie
  • Total Time: 1 hour
  • Yield: 12 servings 1x
  • Diet: Vegetarian

Description

This Mermaid Cake with Sand and Seashells is a stunning ocean-inspired dessert perfect for birthdays, baby showers, and beach-themed parties! A moist vanilla sheet cake is frosted with dreamy ocean-colored buttercream, decorated with crushed cookie “sand,” and adorned with fondant seashells and a shimmering mermaid tail. The result? A show-stopping, magical cake that’s as fun to make as it is to eat!


Ingredients

Scale

For the Cake:

  • 2 ½ cups all-purpose flour (or gluten-free 1:1 flour)
  • 2 ½ tsp baking powder
  • ½ tsp salt
  • 1 cup unsalted butter, softened
  • 1 ¾ cups granulated sugar
  • 4 large eggs
  • 2 tsp vanilla extract
  • 1 cup whole milk (or almond milk for dairy-free)

For the Buttercream Frosting:

  • 1 cup unsalted butter, softened
  • 4 cups powdered sugar
  • 23 tbsp heavy cream (or coconut milk for dairy-free)
  • 1 tsp vanilla extract
  • Blue and teal food coloring

For the Decorations:

  • 1 ½ cups crushed vanilla wafer cookies (for the sand effect)
  • Fondant in pastel colors (purple, teal, pink)
  • Edible pearl sprinkles
  • Gold luster dust (optional, for shimmer)

Instructions

  • Preheat & Prep the Batter

    • Preheat your oven to 350°F (175°C) and grease a 9×13-inch sheet cake pan.
    • In a bowl, whisk together flour, baking powder, and salt.
    • In a separate bowl, cream the butter and sugar until light and fluffy.
    • Beat in the eggs one at a time, then mix in the vanilla extract.
    • Gradually add the dry ingredients, alternating with the milk, until the batter is smooth.
  • Bake the Cake

    • Pour the batter into the prepared pan and bake for 30-35 minutes or until a toothpick inserted in the center comes out clean.
    • Let the cake cool completely before frosting.
  • Prepare the Buttercream

    • Beat the butter until creamy, then gradually add powdered sugar.
    • Mix in the vanilla extract and heavy cream until the frosting reaches a smooth, spreadable consistency.
    • Divide the frosting into two bowls and tint one blue and the other teal.
  • Frost the Cake

    • Spread the blue and teal buttercream over the cake, blending the colors to create an ocean wave effect.
  • Add the Sand and Seashells

    • Sprinkle crushed vanilla wafer cookies over one section of the cake to resemble sand.
    • Shape fondant into seashells and a mermaid tail, dusting them with gold luster dust.
    • Arrange the fondant decorations on the cake and finish with edible pearl sprinkles.
  • Serve and Enjoy!

    • Slice, serve, and enjoy your magical mermaid cake!

Equipment

Notes

  • Make-Ahead Tip: Bake the cake a day ahead and store it in the fridge before decorating.
  • Storage: Keep leftovers in an airtight container at room temperature for 2 days or in the fridge for up to 5 days.
  • Substitutions: Use dairy-free butter and almond milk for a lactose-free version.
  • Prep Time: 25 minutes
  • Cook Time: 35 minutes
  • Category: Dessert
  • Method: Baking
  • Cuisine: American

Nutrition

  • Serving Size: 1 slice
  • Calories: 450 kcal
  • Sugar: 42g
  • Sodium: 210mg
  • Fat: 18g
  • Saturated Fat: 11g
  • Unsaturated Fat: 5g
  • Trans Fat: 0g
  • Carbohydrates: 65g
  • Fiber: 1g
  • Protein: 5g
  • Cholesterol: 85mg

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