Birthday Cake is a timeless celebration staple—soft, fluffy layers of vanilla cake paired with a rich, creamy buttercream frosting and finished with cheerful sprinkles or decorations. This version is perfectly balanced: tender yet sturdy cake layers thanks to sour cream, and a smooth, spreadable frosting that’s ideal for layering, decorating, and slicing cleanly.
This cake is designed to be reliable and crowd-pleasing, whether you’re baking for a child’s birthday, a milestone celebration, or simply because cake is always a good idea. The batter comes together smoothly, bakes evenly, and holds moisture beautifully, while the classic vanilla buttercream can be colored or decorated to suit any theme.
Ingredients
For the Cake
- 2½ cups all-purpose flour – Provides structure while keeping the crumb soft.
- 2½ teaspoons baking powder – Ensures a light, even rise.
- ½ teaspoon salt – Balances sweetness and enhances flavor.
- 1 cup unsalted butter, softened – Adds richness and tenderness.
- 1¾ cups granulated sugar – Sweetens and helps create a fluffy texture.
- 4 large eggs – Bind the batter and add moisture.
- 1 tablespoon vanilla extract – Gives classic birthday cake flavor.
- 1 cup whole milk – Keeps the cake soft and moist.
- ½ cup sour cream – Adds richness and prevents dryness.
For the Frosting
- 1 cup unsalted butter, softened – Forms the creamy base.
- 4 cups powdered sugar – Sweetens and thickens the frosting.
- ¼ cup heavy cream – Creates a smooth, fluffy texture.
- 2 teaspoons vanilla extract – Adds warmth and depth.
- Food coloring (optional) – For custom designs.
- Sprinkles or decorations (optional) – For a festive finish.
Directions
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