Introduction & Inspiration
As someone who loves to bake and create fun and festive treats, I was inspired to create these Unicorn Bars. They’re a whimsical and colorful dessert that’s perfect for birthday parties, holidays, or any celebration where you want to add a touch of magic. The inspiration for this recipe came from my love of unicorns and my desire to create a dessert that was both visually appealing and delicious.
Homemade Focus
While you can certainly find pre-made brownie mixes and frosting at the store, there’s something special about making these bars from scratch. This recipe is surprisingly straightforward, and the result is a batch of unicorn bars that are far superior to anything you can buy pre-made. Plus, making them yourself allows you to control the quality of ingredients and customize the flavors and colors to your liking.
Flavor Goal
The goal here is to create bars that are soft, chewy, and bursting with a balance of sweet and chocolatey flavors. The brownie base should be rich and fudgy, while the vanilla buttercream frosting adds a creamy and sweet complement. The sprinkles add a touch of crunch and a burst of color, making these bars a feast for both the eyes and the taste buds.
Ingredient Insights
Let’s explore the key players in these magical unicorn bars:
For the Brownie Layer:
- Butter: Softened butter adds richness and flavor to the brownie base.
- White Chocolate: White chocolate adds a creamy sweetness and a unique flavor to the brownies.
- Granulated Sugar: Granulated sugar adds sweetness and contributes to the chewy texture of the brownies.
- Eggs: Eggs bind the brownie batter together and add structure.
- All-Purpose Flour: All-purpose flour provides the structure for the brownie base.
- Vanilla Extract: Vanilla extract enhances the overall flavor of the brownies with its warm and sweet notes.
- Salt: Salt balances the sweetness and enhances the flavors of the other ingredients.
- Rainbow Sprinkles: Rainbow sprinkles add a burst of color and a fun crunch to the brownie base.
For the Buttercream Frosting:
- Butter: Softened butter adds richness and creaminess to the frosting.
- Powdered Sugar: Powdered sugar sweetens the frosting and creates a smooth and fluffy texture.
- Heavy Cream: Heavy cream adds richness and helps to create a smooth and spreadable consistency in the frosting.
- Food Coloring: Red and blue food coloring are used to create a vibrant blue and purple icing for decorating the bars.
- Rainbow Sprinkles: Rainbow sprinkles add a festive touch and a bit of crunch to the finished bars.
Equipment
You’ll need a few essential tools to make these unicorn bars:
- 13×9 inch baking dish
- Parchment paper (optional)
- Mixing bowls
- Saucepan
- Stand mixer or handheld mixer
- Spatula
- Wire rack
- Piping bags or zipper bags (optional)
Ingredients
Brownie Layer:
- 1 cup butter, softened
- 10 ounces white chocolate, chopped
- 1 ¼ cups granulated sugar
- 4 large eggs
- 2 cups all-purpose flour
- 1 tablespoon vanilla extract
- ½ teaspoon salt
- ½ cup rainbow sprinkles
Buttercream Frosting:
- 1 cup butter, softened
- 4 cups powdered sugar
- 3 tablespoons heavy cream
- 3 drops red food coloring
- 3 drops blue food coloring
- 1 teaspoon vanilla extract
- ½ cup assorted rainbow sprinkles for decorating

Instructions
- Prepare the Brownie Batter: Preheat oven to 325°F (163°C). Grease a 13×9 inch baking dish or line it with parchment paper. Melt butter and white chocolate in a saucepan over low heat. Let cool slightly. Stir in sugar, then eggs one at a time. Add flour, salt, and vanilla extract; mix well. Fold in sprinkles.
- Bake: Pour batter into the prepared pan and bake for 30-35 minutes, or until a toothpick inserted into the center comes out clean. Cool 1 completely on a wire rack.
- Make the Frosting: Beat butter in a large bowl until smooth. Gradually add powdered sugar, alternating with heavy cream, until light and fluffy. Stir in vanilla extract.
- Color the Frosting: Set aside ½ cup of frosting and tint it blue with food coloring. Divide the blue frosting in half and tint one portion purple with red food coloring.
- Frost and Decorate: Frost the cooled brownies with the remaining white frosting. Pipe diagonal blue lines across the bars, then pipe purple lines diagonally in the opposite direction to create a diamond pattern. Top with sprinkles and enjoy!

Troubleshooting
- Brownies too cakey: Avoid overmixing the batter. Mix only until the ingredients are just combined.
- Brownies too gooey: If the brownies are too gooey, bake them for a few minutes longer, or until a toothpick inserted into the center comes out with a few moist crumbs.
- Frosting too thick: If the frosting is too thick, add a small amount of milk or cream, one teaspoon at a time, until it reaches your desired consistency.
Tips and Variations
- For a richer flavor, you can use brown butter instead of regular butter in the brownie batter.
- Feel free to experiment with different types of sprinkles or add other mix-ins to the brownie batter, such as chocolate chips or chopped nuts.
- You can also use different colors of food coloring to create a variety of frosting designs.
Serving and Pairing Suggestions
These Unicorn Bars are a delightful treat that can be enjoyed on their own or with a glass of milk or a cup of coffee. They’re perfect for birthday parties, holidays, potlucks, or a sweet snack any time of day.
Nutritional Information
(Per serving, approximate)
- Calories: ~350
- Fat: ~20g
- Cholesterol: ~50mg
- Sodium: ~200mg
- Carbohydrates: ~40g
- Protein: ~4g
Unicorn Bars: A Magical and Colorful Treat
These Unicorn Bars are a magical and colorful treat! They’re easy to make, packed with flavor, and perfect for any festive occasion.
Ingredients
Brownie Layer:
- 1 cup butter, softened
- 10 ounces white chocolate, chopped
- 1 ¼ cups granulated sugar
- 4 large eggs
- 2 cups all-purpose flour
- 1 tablespoon vanilla extract
- ½ teaspoon salt
- ½ cup rainbow sprinkles
Buttercream Frosting:
- 1 cup butter, softened
- 4 cups powdered sugar
- 3 tablespoons heavy cream
- 3 drops red food coloring
- 3 drops blue food coloring
- 1 teaspoon vanilla extract
- ½ cup assorted rainbow sprinkles for decorating
Instructions
- Prepare the Brownie Batter: Preheat oven to 325°F (163°C). Grease a 13×9 inch baking dish or line it with parchment paper. Melt butter and white chocolate in a saucepan over low heat. Let cool slightly. Stir in sugar, then eggs one at a time. Add flour, salt, and vanilla extract; mix well. Fold in sprinkles.
- Bake: Pour batter into the prepared pan and bake for 30-35 minutes, or until a toothpick inserted into the center comes out clean. Cool completely on a wire rack.
- Make the Frosting: Beat butter in a large bowl until smooth. Gradually add powdered sugar, alternating with heavy cream, until light and fluffy. Stir in vanilla extract.
- Color the Frosting: Set aside ½ cup of frosting and tint it blue with food coloring. Divide the blue frosting in half and tint one portion purple with red food coloring.
- Frost and Decorate: Frost the cooled brownies with the remaining white frosting. Pipe diagonal blue lines across the bars, then pipe purple lines diagonally in the opposite direction to create a diamond pattern. Top with sprinkles and enjoy!
Recipe Summary and Q&A
Recipe Name: Unicorn Bars
Prep Time: 20 minutes
Cook Time: 30-35 minutes
Yields: 24 bars
Q: Can I use a different type of chocolate?
A: Yes, you can use milk chocolate or dark chocolate instead of white chocolate, but the color of the brownies will be darker.
Q: Can I make these bars ahead of time?
A: Absolutely! You can bake the brownies ahead of time and store them in an airtight container at room temperature for up to 3 days or in the freezer for up to 3 months. Frost and decorate the bars just before serving.
Q: Can I use a different type of frosting?
A: Yes, you can use any type of frosting that you like, such as cream cheese frosting or chocolate frosting.
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