Description
This delightful 4-inch mini birthday cake recipe produces a small, moist, and fluffy cake bursting with rainbow sprinkles inside. Perfect for a personal celebration or an intimate gathering, this cake features a tender crumb enhanced by vanilla and almond extracts and is topped with a smooth, creamy vanilla buttercream frosting. The recipe is designed for baking three tiny cake layers that are stacked and frosted to create a charming mini cake that's both visually appealing and delicious.
Ingredients
Dry Ingredients
- 1 cup (125 grams) all-purpose flour
- ½ teaspoon baking powder
- ½ teaspoon baking soda
- ¼ teaspoon kosher salt
Wet Ingredients & Cake Batter
- 6 tablespoons (85 grams) unsalted butter, melted and cooled
- ½ cup (100 grams) granulated sugar
- 2 teaspoons vanilla extract
- 1 teaspoon almond extract
- 1 egg at room temperature
- 2 tablespoons canola oil (or other colorless, odorless oil like vegetable or rapeseed)
- ½ cup (120 grams) buttermilk, room temperature
- ⅓ cup (60 grams) rainbow sprinkles
Buttercream Frosting
- 4 tablespoons (56 grams) unsalted butter, room temperature
- 2 cups (225 grams) powdered sugar
- ⅓ cup (85 grams) heavy cream (for a thicker frosting) or milk (for thinner)
- 2 teaspoons vanilla extract
- 1 teaspoon almond extract
- Pinch of salt
- Optional: A few drops of lemon or lime juice (or white vinegar) to cut sweetness; add to your preference
Instructions
- Prepare the pans and preheat oven: Preheat your oven to 350°F (175°C) and grease three 4-inch cake pans thoroughly to prevent sticking.
- Mix dry ingredients: In a large bowl, whisk together the all-purpose flour, baking powder, baking soda, and kosher salt. Set aside for later use.
- Mix wet ingredients: In another bowl, whisk melted and cooled butter with granulated sugar, vanilla extract, almond extract, and canola oil for about 2 minutes until combined.
- Add egg: Stop mixing, add the room temperature egg, and beat again for about 1 minute until well incorporated.
- Combine dry and wet ingredients: Add half of the dry mixture and half of the buttermilk to the wet ingredients. Mix for approximately 45 seconds to combine, then repeat with the remaining dry ingredients and buttermilk.
- Fold in sprinkles: Gently fold the rainbow sprinkles into the batter, taking care not to overmix to prevent color bleeding.
- Pour batter into pans and bake: Evenly distribute the batter into the prepared cake pans, smoothing the tops. Bake for 25-30 minutes, or until the cakes are firm, buttery, and spring back to the touch.
- Cool cakes: Allow the cakes to cool in the pans for about 5 minutes before transferring them to a wire rack to cool completely.
- Prepare buttercream frosting: Using a stand mixer fitted with a paddle attachment or a handheld mixer, beat the softened unsalted butter, powdered sugar, pinch of salt, heavy cream or milk, vanilla extract, and almond extract on low speed for 30 seconds. Then increase speed to medium-high and beat for 5 minutes until light and fluffy.
- Adjust sweetness: Taste the frosting and add a few drops of lemon or lime juice or white vinegar to cut the sweetness if desired, mixing briefly to combine.
- Assemble cake layers: Place a small dollop of buttercream on a cake circle to act as glue. Position the first cake layer on top, then pipe or spread about one-third of the frosting evenly over this layer.
- Add second layer: Place the second cake layer on top of the frosted one, adding more frosting between layers to fill gaps as needed.
- Add final layer and crumb coat: Place the third cake layer on top and pipe a thick layer of frosting over the entire cake sides and top for a crumb coat.
- Smooth cake frosting: Use a cake scraper or the back of a bench scraper against the cake's side and gently rotate the cake to smooth out bubbles and imperfections. Continue until the surface is even and smooth. Use an offset spatula to push excess frosting on top toward the center.
- Decorate the cake: If desired, use an open star piping tip to create decorative buttercream swirls around the cake's top edge and sprinkle additional rainbow sprinkles for festive charm.
Notes
- Use room temperature ingredients for optimal mixing and texture.
- Be careful not to overmix the batter once flour is added to avoid a dense texture.
- Rainbow sprinkles may cause slight color bleeding; fold them in gently at the end.
- Using canola or other neutral oil helps keep the cake moist without overpowering flavor.
- Add lemon or lime juice sparingly to your frosting to balance sweetness.
- If you don’t have three 4-inch pans, bake in batches or use disposable pans.
- This recipe yields a small 4-inch cake, perfect for intimate celebrations.
- Prep Time: 20 minutes
- Cook Time: 30 minutes
- Category: Dessert
- Method: Baking
- Cuisine: American
