11th Birthday Rainbow Sprinkle “Fluffy” the Unicorn Cake

We try to be as fair as possible in our house…

So, while I’m sharing birthday treats, I am going to have to share my daughter’s 11th birthday cake too. Her birthday was in November! (I’m very behind on my posts…)

The bright side of having my daughter turn 11-years old was that she was mature enough to choose going to a Broadway show over having a birthday party. 🙂 We saw Aladdin!

The down side of having my daughter turn 11-years old was that she was mature enough to browse Pinterest for birthday cake ideas. 😉

Her Pinterest search resulted in another Universal Studios inspired birthday dessert. (We actually celebrated her birthday before having my son’s Harry Potter World Butterbeer Cupcakes, so maybe she actually inspired his dessert choice!) It was a very unicorn-themed day, complete with unicorn pajamas, unicorn slippers, and many horn “accessories” for other animals. 🙂

I used the Rainbow Sprinkle Cake recipe that we enjoyed last year on her birthday to create a “Fluffy” the Unicorn cake. It just makes sense that a unicorn cake involve rainbows in some way. For those of you who don’t know, this unicorn is from the Despicable Me and Minions movies. I doubled the recipe to make 2 1-pound loaves of cake for the head and body. I also made 4 cupcakes for the legs using the same batter.

The eyes, ears, and tongue were made using dough from my batch of unicorn and “11” Number Cookies. The horn was made with molded rice krispie treats. I also used rice krispie treats to support the position of the head. Rainbow candy was used for the mane and tail- this was a subtle but fun deviation from the actual unicorn from the movies. Pretty cute! 🙂

For the Cake:

  • 1 cup/220 grams unsalted butter (2 sticks), slightly softened, more for pans
  • 3 cups/380 grams all-purpose flour, more for pans
  • 2 teaspoons baking powder
  • 1/2 teaspoon baking soda
  • 1/2 teaspoon fine salt
  • 1 1/3 cups/316 ml whole milk
  • 3 teaspoons pure vanilla extract
  • 2 cups/400 grams sugar
  • 2 whole eggs plus 4 egg whites
  • 2/3 cup rainbow sprinkles (not pastel, or naturally colored)

For the Cream Cheese Frosting:

  • 24 ounces cream cheese, slightly softened
  • 1 1/2 cups/330 grams unsalted butter (3 sticks), slightly softened
  • scant 1/2 teaspoon fine sea salt, more to taste
  • 9 cups/900 grams confectioners’ sugar, sifted, more to taste
  • 1 1/2 teaspoons pure vanilla extract

For the Decorations:

  • sugar cookie eyes, ears, and tongue
  • rice krispie treats (store-bought or homemade)
  • gold sprinkles
  • “air head” rainbow candy
  • red gel food coloring
  • chocolate chips

  1. Make the cake: Heat oven to 325 degrees, preferably on convection, and place a rack in the center.
  2. Butter and line the bottoms of two 1-pound loaf pans with parchment paper. Butter the parchment. Flour the pans, coating the bottom and sides, then tap out any excess flour. Coat 4 muffin pan wells with cooking oil spray.
  3. In a medium bowl, whisk together flour, baking powder, baking soda and salt.
  4. In a small bowl, stir together milk and vanilla.
  5. In a mixer fitted with the paddle attachment, beat butter and sugar at medium-high speed until light and fluffy, 2 to 3 minutes.
  6. Reduce speed to low and, with mixer running, slowly add egg and whites and beat until smooth and creamy, 1 to 2 minutes. Scrape down bowl.
  7. Add half the flour mixture, then the milk mixture, then the remaining flour mixture, beating to blend after each addition.
  8. Scrape down bowl and blend once more.
  9. Remove bowl and use a spatula or spoon to fold in sprinkles by hand.
  10. Fill the 4 prepared muffin pan wells about 2/3 full. Bake until the a toothpick inserted into the center comes out clean, 16 minutes.
  11. Divide remaining batter evenly between the pans (approximately 1190 g per pan), and bake until the tops are just dry to the touch and a toothpick inserted into the center comes out clean, 45 to 50 minutes. Rotate the pans halfway through baking.
  12. Transfer pans to a wire rack and let cool completely, at least 2 to 4 hours, before turning out.
  13. Make the frosting: In a mixer fitted with the paddle attachment, beat cream cheese, butter and salt together at medium speed until light and fluffy, 2 minutes.
  14. Reduce speed to low and, with mixer running, slowly add sugar and beat until smooth.
  15. Beat in vanilla just until incorporated.
  16. Taste frosting; you should be able to taste the cream cheese and a little bit of saltiness, as well as the sweetness. If desired, add more salt or sugar. Keep refrigerated.
  17. Turn cooled cakes out of pans.
  18. Slice loaves in half and spread icing between the layers.
  19. Place cakes on a platter positioned as a head and body. (I made a support ramp with rice krispie treats.)
  20. Using an offset spatula, frost the top surface as a crumb coat.
  21. Form the horn with one rice krispie treat, ice and cover with gold sprinkles. (I microwaved the rice krispie treat for 10 seconds to make it easier to mold. I also coated my hands with cooking spray!)
  22. Refrigerate until firm.
  23. Using a pastry bag and a star tip, place remaining frosting all over the cake.
  24. Color remaining frosting pink and ice the cupcake legs/feet. Top the cupcakes with sugar cookie and place on the cake.
  25. Decorate with cookie eyes, ears, and tongue.
  26. Pipe the pink decorative stripe on the snout.
  27. Using melted chocolate, pipe the nostrils.
  28. Using a star pastry tip, fill in the “fluffy” fur with the frosting over the head and body.
  29. Use either remaining pink frosting or rainbow candy, form the mane and tail.
  30. Refrigerate cake 30 minutes or longer to set. Serve cool.

One Year Ago: Rainbow Sprinkle Cake & a Festive “Candy Shop” Themed Birthday Party

Two Years Ago: Pig Party!

Three Years Ago: Birthday Red Velvet “Owl” Cupcakes

Four Years Ago: The Best Birthday Cupcakes  &  Apple Layer Cake with Maple-Cream Cheese Frosting

Five Years Ago: Birthday Cake Gallery

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Rainbow Sprinkle Cake & a Festive “Candy Shop” Themed Birthday Party

The lollipop candles on this birthday cake inspired the theme for my daughter’s 10th birthday party. As soon as she saw them, about ten months before her birthday, she started planning a “Candy Shop” themed party.

Knowing we would have the guests watch the most classic candy movie, Willy Wonka and the Chocolate Factory, we invited her guests by hand delivering a “Golden Ticket” wrapped with a giant rainbow swirl lollipop. (The biggest ones we could find, of course.) 🙂

She imagined an abundant display of colorful candy and rainbow balloons. We had bowls of Skittles, M&M’s, mini-Starbursts, jelly beans, gummy bears, mini-marshmallows, mini-Twix (her favorite candy), and varieties of sprinkles. The centerpiece was a DumDum lollipop “topiary.”

The girls ate a lot of candy :/ , but they also used it to decorate chocolate covered marshmallows and chocolate-caramel apple slices. We also had pretzels for toppings- so yummy with chocolate. We tried to coat Oreos with chocolate as well, but had technical difficulties.

We had other candy-themed activities at the party including making candy necklaces on kitchen twine. They used Fruit Loops, gummy pendants, and gummy lifesavers as “beads.” They also played a game with Jelly Belly jelly beans- identifying the flavors by taste alone. Even though is wasn’t a candy-themed activity, the kids probably had the most fun having an iMovie competition.

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We had our traditional celebratory Number Cookies too. 🙂

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Having a cake covered in a mound of sprinkles seemed to work with our theme! The Rainbow Sprinkle Birthday Cake is a homemade take on a “Funfetti” cake mix cake. It was so colorful and fun, but also really REALLY delicious- super moist with fabulous vanilla flavor. The recipe was adapted from The New York Times, contributed by Julia Moskin. I weighed the ingredients, increased the amount of frosting, and modified the decorating techniques.

Rainbow Sprinkle Cake

Yield: 8-12 Servings (1 layer cake or 12 cupcakes)

For the Cake:

  • ½ cup/110 grams unsalted butter (1 stick), slightly softened, more for pans
  • 1 ½ cups/190 grams all-purpose flour, more for pans
  • 1 teaspoon baking powder
  • Âź teaspoon baking soda
  • Âź teaspoon fine salt
  • ⅔ cup/158 ml whole milk
  • 1 ½ teaspoons pure vanilla extract
  • 1 cup/200 grams sugar
  • 1 whole egg plus 2 egg whites
  • ⅓ cup rainbow sprinkles (not pastel, or naturally colored)


For the Cream Cheese Frosting:

  • 12 ounces cream cheese, slightly softened
  • 3/4 cup/165 grams unsalted butter (1 1/2 sticks), slightly softened
  • scant 1/4 teaspoon fine sea salt, more to taste
  • 4 1/2 cups/450 grams confectioners’ sugar, sifted, more to taste
  • 3/4 teaspoon pure vanilla extract
  • 1/2 cup rainbow sprinkles (not pastel, or naturally colored), or more, as desired
  1. img_7880Make the cake: Heat oven to 325 degrees, preferably on convection, and place a rack in the center.
  2. Butter and line the bottoms of two 8-inch round cake pans with parchment paper. Butter the parchment. Flour the pans, coating the bottom and sides, then tap out any excess flour.
  3. In a medium bowl, whisk together flour, baking powder, baking soda and salt.
  4. In a small bowl, stir together milk and vanilla.
  5. In a mixer fitted with the paddle attachment, beat butter and sugar at medium-high speed until light and fluffy, 2 to 3 minutes.
  6. Reduce speed to low and, with mixer running, slowly add egg and whites and beat until smooth and creamy, 1 to 2 minutes. Scrape down bowl.
  7. Add half the flour mixture, then the milk mixture, then the remaining flour mixture, beating to blend after each addition.
  8. Scrape down bowl and blend once more.
  9. Remove bowl and use a spatula or spoon to fold in sprinkles by hand.
  10. Divide batter evenly between the pans (approximately 400 g per pan), and bake until the tops are just dry to the touch and a toothpick inserted into the center comes out clean, 20 to 25 minutes. Rotate the pans halfway through baking.
  11. Transfer pans to a wire rack and let cool completely, at least 2 to 4 hours, before turning out.
  12. Make the frosting: In a mixer fitted with the paddle attachment, beat cream cheese, butter and salt together at medium speed until light and fluffy, 2 minutes.
  13. Reduce speed to low and, with mixer running, slowly add sugar and beat until smooth.
  14. Beat in vanilla just until incorporated.
  15. Taste frosting; you should be able to taste the cream cheese and a little bit of saltiness, as well as the sweetness. If desired, add more salt or sugar. Keep refrigerated.
  16. Turn cooled cakes out of pans.
  17. Using a bread knife, cut off any domed or uneven parts of each cake to make flat surfaces.
  18. Place one of the cakes on a platter or a cake stand, cut side up.
  19. Using an offset spatula, frost the top.
  20. Stack the other layer on top, cut side down.
  21. Place remaining frosting on top of the cake and, working from the center outward, frost the top and sides of the cake, as desired. I piped a border around the perimeter of the top of the cake to keep the thick coating of sprinkles on top in place.
  22. Sprinkle the top with a thick layer of sprinkles. Coat the sides with sprinkles as well, if desired.
  23. Refrigerate cake 30 minutes or longer to set. Serve cool.

Note: This recipe would also work well for cupcakes. Fill batter in 12 cupcake liners and bake 17-20 minutes, on convection.

One Year Ago:

Two Years Ago:

Three Years Ago:

Four Years Ago:

It was so tasty, I’ve already made it again! 🙂 I think it might need THREE layers next time. We all absolutely love it.

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