If you love colorful, nostalgic desserts, this Sprinkle Birthday Cake is pure joy in every bite. With soft, buttery white cake layers, fluffy almond buttercream, and a glossy chocolate drip, it’s the kind of cake that makes any celebration feel magical. Every slice sparkles with rainbow jimmies and that sweet bakery-style charm.
Ingredients
For the White Cake
- 1 cup milk, room temperature
- 4 egg whites, room temperature
- 2 ¼ cups cake flour
- 2 ½ tsp baking powder
- ½ tsp salt
- ⅔ cup unsalted butter, softened
- 1 cup granulated sugar
- 1 tsp almond or clear vanilla extract
- 2 tbsp sour cream, room temperature (not low-fat)
For the Buttercream Frosting
- 2 cups salted butter, softened
- 5 ½ cups powdered sugar
- 1 ½ tsp almond or clear vanilla extract
- 2–5 tbsp heavy whipping cream or milk
For the Chocolate Ganache Drip
- 3 oz finely chopped chocolate or ½ cup dark chocolate chips
- ⅓ cup heavy whipping cream
- ½ tsp corn syrup
For the Decoration
- ½ cup rainbow sprinkles (jimmies)
Instructions
Step 1: Bake the White Cake
Preheat your oven to 350°F. Grease and flour three 6-inch round cake pans, then line with parchment circles. Whisk together milk and egg whites; set aside. In another bowl, mix flour, baking powder, and salt.
Beat butter and sugar until fluffy, then add extract. Alternate adding dry ingredients and milk mixture, finishing with sour cream for that silky texture. Divide batter evenly between pans and bake for 28–34 minutes. Cool completely on a rack.
Step 2: Make the Buttercream
Beat softened butter until light, then add powdered sugar, extract, and a splash of cream. Whip until fluffy, adjusting the cream until it’s smooth and spreadable.
Step 3: Frost the Cake
Trim any domed tops, then layer cakes with frosting between each. Apply a crumb coat and chill for 20 minutes. Frost the whole cake and chill again while preparing the ganache.
Step 4: Add the Chocolate Drip
Pour warm cream over chopped chocolate and let it stand for 5 minutes. Stir in corn syrup until glossy. Cool slightly, then spoon or drizzle over the cake’s edges for those perfect drips.
Step 5: Decorate and Serve
Press sprinkles around the base, pipe frosting swirls on top, and shower with more rainbow jimmies. Let the cake come to room temperature before serving for the perfect soft bite.
Sprinkle Birthday Cake
Equipment
- Three 6-inch round cake pans Line with parchment circles for easy release
- Electric hand mixer Stand mixer also works
- Mixing bowls & spatula For batter and frosting
- Small saucepan To heat cream for ganache
- Heatproof bowl For melting chocolate
- Cooling racks Cool layers completely
- Cake turntable (optional) Easier frosting
- Pastry bag + large open star tip For piping swirls
- Squeeze bottle (optional) Controlled ganache drips
Ingredients
- 1 cup milk, room temperature
- 4 large egg whites, room temperature
- 2 1/4 cups cake flour
- 2 1/2 teaspoons baking powder
- 1/2 teaspoon salt
- 2/3 cup unsalted butter, softened
- 1 cup granulated sugar
- 1 teaspoon almond extract or clear vanilla extract
- 2 tablespoons sour cream, room temperature (not low-fat)
- 2 cups salted butter, softened (for frosting)
- 5 1/2 cups powdered sugar (for frosting)
- 1 1/2 teaspoons almond or clear vanilla extract (for frosting)
- 2–5 tablespoons heavy whipping cream or milk (for frosting)
- 3 ounces finely chopped chocolate or 1/2 cup dark chocolate chips (for ganache)
- 1/3 cup heavy whipping cream (for ganache)
- 1/2 teaspoon corn syrup (for ganache)
- 1/2 cup rainbow sprinkles (jimmies)
Instructions
- Preheat oven to 350°F (175°C). Grease and flour three 6-inch round cake pans; line bottoms with parchment for easy release.
- Whisk milk and egg whites until smooth; set aside. In a separate bowl, stir together cake flour, baking powder, and salt.
- Beat butter and sugar on medium-high until pale and fluffy, 3–4 minutes. Blend in almond or clear vanilla extract.
- On low speed, add one-third of dry ingredients, then half the milk mixture. Repeat, ending with dry ingredients. Mix in sour cream until smooth; do not overmix.
- Divide batter evenly among pans. Bake 28–34 minutes, until a toothpick comes out with a few moist crumbs. Cool 10 minutes, then turn out and cool completely.
- Beat softened butter 3 minutes until fluffy. Add powdered sugar, extract, and 2 tbsp cream. Beat on low to combine, then medium-high 2–3 minutes. Adjust cream for spreadable consistency.
- Level cake tops if needed. Layer cakes with 1/2-inch frosting between layers. Apply a thin crumb coat and chill 20 minutes. Frost top and sides; reserve about 1/2 cup frosting for decoration. Chill 30 minutes.
- Place chopped chocolate in a heatproof bowl. Heat cream just to a simmer; pour over chocolate. Rest 5 minutes, add corn syrup, then stir until smooth and glossy. Cool 15–30 minutes, stirring often, until slightly thickened but pourable.
- Press sprinkles around the cake base. Spoon or squeeze ganache along the top edge to create drips, then cover the top. Chill 10 minutes to set.
- Pipe reserved buttercream into large stars around the top edge using a large open star tip. Add extra rainbow jimmies. Let cake come to room temperature before slicing.