There’s something about unicorns that never really goes out of style. Maybe it’s the sparkle. Maybe it’s the pastel colors. Or maybe it’s that magical feeling they bring to any celebration. Whatever the reason, girly unicorn birthday cakes continue to steal the spotlight at parties everywhere.

If you’re planning a unicorn-themed birthday party and want a cake that feels special without being overwhelming, you’re in the right place. You don’t need to be a professional baker to pull off something beautiful. In fact, the most charming unicorn cakes are often the simplest ones.

Below, you’ll find 15 simple girly unicorn birthday cakes to love — each one easy enough for home bakers but stunning enough to wow your guests.

Why Girly Unicorn Birthday Cakes Are So Popular

Before we dive into the designs, let’s talk about why girly unicorn birthday cakes are everywhere right now.

Unicorn themes blend:

• Pastel colors like pink, lavender, mint, and baby blue

• Whimsical decorations

• Gold accents

• Buttercream textures

• Rainbow elements

• Glitter and sparkle

They’re perfect for kids’ birthday parties, especially for toddlers, preschoolers, and elementary school girls. However, they also work beautifully for teen celebrations and even whimsical adult birthdays.

Plus, unicorn cake decorations are widely available, from edible cake toppers to fondant horns, making it easy to create a professional look at home.

Now, let’s get to the fun part.

1. Classic White Unicorn Cake with Gold Horn

If you want timeless elegance, this is the go-to design.

What Makes It Special

• Smooth white buttercream frosting

• Golden fondant horn

• Pastel buttercream rosettes

• Closed eyelash detail in black icing

This style of girly unicorn birthday cakes is clean, polished, and surprisingly easy to recreate. You can use a simple round cake pan and focus on decorating rather than complicated baking techniques.

Pro tip: Use a cake turntable for smooth frosting and evenly spaced piping swirls.

2. Pink Ombre Unicorn Cake

Pink never goes wrong at a girly celebration.

Design Highlights

• Ombre buttercream layers fading from dark pink to soft blush

• Edible glitter dust

• Mini fondant ears

• Matching pink sprinkles

The gradient effect adds depth and makes the cake look professionally styled. Ombre unicorn cakes are one of the most requested girly unicorn birthday cakes because they photograph beautifully.

3. Rainbow Mane Unicorn Cake

Want something bold and colorful? Go with a rainbow mane.

Key Elements

• Bright rainbow buttercream swirls

• Piping tips for texture

• Candy pearls

• Edible stars

This design screams fun. It’s perfect for a lively unicorn-themed birthday party with colorful decorations and balloons.

Moreover, kids absolutely love vibrant rainbow cakes — they feel magical and festive.

4. Minimalist Pastel Unicorn Cake

Sometimes less is more.

This version of girly unicorn birthday cakes focuses on soft tones:

• Baby pink

• Lavender

• Pale blue

• Creamy white

Instead of heavy decorations, use simple piping and a delicate horn. The result is elegant and sweet without looking overdone.

If you’re planning a small gathering at home, this style feels intimate and charming.

5. Unicorn Drip Cake

Drip cakes are trending for a reason.

Features

• White chocolate drip

• Pastel buttercream base

• Unicorn cake topper

• Gold accents

The drip effect adds texture and visual interest. Additionally, it gives you room to play with different flavors like vanilla cake, strawberry filling, or funfetti sponge.

Among all girly unicorn birthday cakes, this one feels modern and Instagram-worthy.

6. Floral Unicorn Cake

Fresh flowers instantly elevate any cake.

What You’ll Need

• Edible flowers (or food-safe artificial flowers)

• Soft buttercream

• Metallic gold horn

• Textured frosting finish

Floral unicorn cakes are ideal for spring birthdays or garden-themed parties. They bring together fantasy and elegance effortlessly.

7. Two-Tier Unicorn Cake

If you’re hosting a bigger party, go for a two-tier option.

Why It Works

• Dramatic presentation

• Extra servings

• Space for detailed decorations

Two-tier girly unicorn birthday cakes look impressive but can still be simple in design. Keep one tier plain and decorate the other with pastel rosettes.

8. Unicorn Cupcake Cake Combo

Not ready to commit to one big cake?

Create:

• A small unicorn face cake

• Matching unicorn cupcakes

This approach makes serving easier and adds variety. Cupcakes decorated with rainbow frosting and edible glitter are always a hit.

9. Sparkly Glitter Unicorn Cake

Let’s talk sparkle.

Use:

• Edible glitter spray

• Shimmer dust

• Metallic gold paint for fondant

Sparkly girly unicorn birthday cakes capture that magical fantasy vibe kids adore. Just make sure all decorations are food-safe.

10. Sleeping Unicorn Cake

The closed eyes with long lashes? Adorable.

This design focuses on:

• Eyelash detail

• Soft pastel mane

• Round cake shape

It’s one of the easiest unicorn cake designs to recreate and still looks professional.

11. Buttercream Texture Unicorn Cake

Instead of smooth frosting, try texture.

Use:

• Offset spatula strokes

• Palette knife techniques

• Soft color blending

Textured girly unicorn birthday cakes feel handcrafted and unique, perfect if you want a handmade touch.

12. Watercolor Unicorn Cake

Watercolor cakes blend colors softly across the surface.

Technique

• Apply white buttercream

• Add small amounts of food coloring

• Blend gently with a spatula

The result is dreamy and artistic. Watercolor girly unicorn birthday cakes feel magical without heavy decorations.

13. Unicorn Number Cake

For milestone birthdays, number cakes are perfect.

Shape the cake into:

• 3, 5, 7, or any age

Decorate with:

• Buttercream dollops

• Candy

• Mini unicorn toppers

It combines personalization with unicorn charm.

14. Fondant Unicorn Cake

If you’re comfortable working with fondant, this option gives a polished finish.

Features include:

• Smooth fondant covering

• Detailed ears and horn

• Sculpted flowers

Fondant girly unicorn birthday cakes look like they came straight from a bakery display.

15. Simple DIY Unicorn Sheet Cake

Not everyone wants a layered cake.

A sheet cake is:

• Easier to bake

• Simple to frost

• Perfect for large gatherings

Draw a unicorn face directly on top using buttercream. Add colorful swirls around it. This is one of the most beginner-friendly girly unicorn birthday cakes you can make at home.

Popular Flavors for Unicorn Birthday Cakes

Design is important, but flavor matters just as much.

Here are crowd-pleasing options:

• Vanilla sponge cake

• Chocolate cake

• Strawberry shortcake

• Funfetti cake

• Red velvet cake

• Lemon cake

• Rainbow layered cake

• Cookies and cream

• Confetti birthday cake

Pair with fillings like:

• Buttercream frosting

• Cream cheese frosting

• Strawberry jam

• Chocolate ganache

• Whipped cream

Essential Decorations for Girly Unicorn Birthday Cakes

To make your cake stand out, consider these decorating elements:

• Fondant horn

• Unicorn ears

• Edible glitter

• Gold leaf

• Candy pearls

• Rainbow sprinkles

• Pastel rosettes

• Star-shaped sprinkles

• Metallic cake toppers

• Sugar flowers

These small details transform simple cakes into magical centerpieces.

Quick Comparison Table

Tips for Making the Perfect Unicorn Cake

Even simple girly unicorn birthday cakes can look bakery-quality with these tips:

1. Chill Between Layers

Refrigerate your cake after crumb coating. It makes final frosting smoother.

2. Use Quality Food Coloring

Gel food coloring gives vibrant pastel shades without thinning buttercream.

3. Practice Piping

Try different piping tips on parchment paper before decorating.

4. Plan Ahead

Prepare decorations like fondant horns a day in advance.

5. Keep It Balanced

Don’t overcrowd the top. Simplicity often looks more elegant.

Why Simple Unicorn Cakes Often Look Better

It’s tempting to go overboard with decorations. However, clean lines and thoughtful details usually create a more polished result.

Simple girly unicorn birthday cakes:

• Photograph better

• Taste better (less heavy fondant)

• Are easier to transport

• Feel more handmade and personal

And honestly, guests remember the overall magic — not how many decorations were on top.

Final Thoughts: Create Magic with Simplicity

At the end of the day, girly unicorn birthday cakes aren’t just about frosting and sprinkles. They’re about creating a magical moment. When the birthday girl sees that pastel mane, golden horn, and shimmering details, her face lights up. That’s what matters.

Whether you choose a classic white unicorn cake, a bold rainbow mane, or a simple sheet cake with sweet eyelash details, you truly can’t go wrong. Keep it simple. Keep it magical. And most importantly, make it with love.

Which of these girly unicorn birthday cakes is your favorite? Share your thoughts, ideas, or baking tips in the comments — and don’t forget to pass this guide along to someone planning a unicorn-themed birthday party.