Perfect Blue Round Cake
A stunning two-layer blue round cake with smooth buttercream frosting, perfect for birthdays and special celebrations.
Equipment
- 2 9-inch round cake pans
- Parchment Paper
- Electric mixer (stand or hand)
- mixing bowls
- Measuring Cups and Spoons
- Rubber spatula
- Offset Spatula
- Cake turntable (optional)
- Wire cooling rack
- Bench Scraper
Ingredients
For the Blue Cake Layers
- 3 cups all-purpose flour
- 2 cups granulated sugar
- 1 tablespoon baking powder
- 1/2 teaspoon salt
- 4 large eggs room temperature
- 1 cup unsalted butter softened
- 1 cup buttermilk room temperature
- 2 teaspoons vanilla extract
- Blue gel food coloring to desired shade
For the Blue Buttercream Frosting
- 1 1/2 cups unsalted butter softened
- 6 cups powdered sugar sifted
- 3-4 tablespoons heavy cream
- 2 teaspoons vanilla extract
- 1/4 teaspoon salt
- Blue gel food coloring to desired shade
Optional Decorations
- 1/4 cup white or silver sprinkles
- 1/4 cup edible pearls or sugar decorations
- 1/2 cup white chocolate chips for ganache drip optional
- 1/4 cup heavy cream for ganache optional
Instructions
- Preheat oven to 350°F (175°C). Grease two 9-inch round cake pans, line bottoms with parchment paper circles, and dust sides with flour.
- In a medium bowl, whisk together flour, baking powder, and salt. In a large mixing bowl, cream butter and sugar until light and fluffy, about 3-5 minutes.3 cups all-purpose flour, 1 tablespoon baking powder, 1/2 teaspoon salt, 1 cup unsalted butter softened, 2 cups granulated sugar
- Add eggs one at a time, beating well after each addition. Mix in vanilla extract. Gradually add dry ingredients to butter mixture, alternating with buttermilk, beginning and ending with dry ingredients.4 large eggs room temperature, 2 teaspoons vanilla extract, 1 cup buttermilk room temperature
- Once batter is smooth, add blue gel food coloring gradually until desired shade is reached (slightly darker than target color). Divide batter evenly between prepared pans and smooth tops.Blue gel food coloring to desired shade
- Bake for 25-30 minutes or until a toothpick inserted into center comes out clean. Cool in pans for 10 minutes, then invert onto wire racks to cool completely (1-2 hours).
- For frosting, beat softened butter until creamy. Gradually add sifted powdered sugar, then mix in vanilla extract and salt. Add heavy cream 1 tablespoon at a time until desired consistency is reached.1 1/2 cups unsalted butter softened, 6 cups powdered sugar sifted, 2 teaspoons vanilla extract, 1/4 teaspoon salt, 3-4 tablespoons heavy cream
- Add blue gel food coloring to frosting gradually until desired shade is achieved. Mix thoroughly for 3-4 minutes until light and fluffy.Blue gel food coloring to desired shade
- Place one cake layer on serving plate. Spread about 1 cup of blue buttercream evenly over the top. Place second layer on top, flat side up.1/4 cup edible pearls or sugar decorations
- Apply a thin crumb coat of frosting over entire cake. Chill for 15-30 minutes, then apply final layer of buttercream, smoothing sides and top with offset spatula and bench scraper.
- Decorate as desired with sprinkles, piped designs, or optional white chocolate ganache drip. Store at room temperature under cake dome for up to 2 days or refrigerate for 3-5 days.1/4 cup white or silver sprinkles, 1/2 cup white chocolate chips for ganache drip, 1/4 cup heavy cream for ganache
Notes
- For best blue color, use gel food coloring rather than liquid.
- Start with less food coloring and add gradually to achieve desired shade.
- If your blue cake has a green tinge, use clear vanilla extract next time.
- For navy blue, add a tiny amount of black or purple gel coloring to your blue.
- Allow refrigerated cake to come to room temperature (1-2 hours) before serving for best flavor and texture.