Unicorn Bars Recipe

4.86 from 7 votes

These super fun bars are soft, cake-like bars, filled with lots of sprinkles and topped with fluffy buttercream icing and some more rainbow sprinkles for garnish.

It's a super fun dessert, ideal for birthday parties, a baby shower (dye the frosting with pink food coloring instead if it's a girl!) or just for the entire family to enjoy!

Prep Time25

Cook Time20

Total Time45

Servings: 24 bars

Author: Maria Corcuera

Ingredients

Bars

2 Cups all-purpose flour
2 Tablespoons cornstarch
1 teaspoon baking soda
3/4 Cup granulated sugar
1 Cup unsalted butter room temperature
1/2 teaspoon salt
1 large egg room temperature
1 large yolk room temperature
1/4 Cup sour cream room temperature
1/4 Cup full fat milk room temperature
2 teaspoons vanilla extract
1/2 Cup jimmies sprinkles

Buttercream

1 Cup unsalted butter room temperature
1 teaspoon pure vanilla extract
4 1/2 Cups powdered sugar sifted
1/2 teaspoon salt
3-4 drops Blue food coloring optional

Instructions

Bars:

Start by lining the bottom and sides of a 9x13 inch baking pan with parchment paper or grease and dust with flour a square baking dish, and set aside. Pre-heat the oven to 350 F
On a separate bowl mix the dry ingredients (flour, cornstarch, baking soda). On a large mixing bowl mix sugar, butter, and salt, until no lumps are visible and butter is creamed. Add in egg and egg yolk, sour cream, milk and vanilla extract and mix until combined.
2 Cups (250 g) all-purpose flour, 2 Tablespoons cornstarch, 1 teaspoon baking soda, 3/4 Cup (150 g) granulated sugar, 1 Cup (227 g) unsalted butter, 1/2 teaspoon (0.5 teaspoon) salt, 1 large (1) egg, 1 large yolk, 1/4 Cup (57.5 g) sour cream, 1/4 Cup (59.1 ml) full fat milk, 2 teaspoons vanilla extract
Mix in the dry ingredients with a spatula, being careful to not over mix the dough. Fold in 1/2 Cup sprinkles and pour into prepared pan, spreading evenly using the back of a spoon. Bake for 20-24 minutes or until a toothpick inserted in the middle comes out clean. Let cool completely.
1/2 Cup (80 g) jimmies sprinkles

Buttercream:

Cream butter with an electric mixer in high speed until light and fluffy. Add the vanilla extract, sifted powdered sugar and salt, and start beating in low, then turning the speed up. Add a few drops of blue food coloring for a colorful frosting, one drop at a time, until reaching desired shade (or a different color of your choice), and beat until frosting is creamy and color is homogeneous.
1 Cup (227 g) unsalted butter, 1 teaspoon pure vanilla extract, 4 1/2 Cups (540 g) powdered sugar, 1/2 teaspoon (0.5 teaspoon) salt, 3-4 drops Blue food coloring
Frost the completely cooled bars, then decorate with extra sprinkles, mini marshmallows or white chocolate chips (or all 3 of them!), and cut into 24 bars

Nutrition