Prep Time: 20 minutes
Cook Time: 30 minutes
Total Time: 3 hours (includes cooling)
Yield: serves 8
Updated in 2020, this is my favorite recipe for a one layer sprinkle cake. Tastes close to box funfetti cake mix, but it’s completely from-scratch. For best success, read the recipe and recipe notes before beginning.
- 1 and 1/2 cups (170g) cake flour (spoon & leveled)
- 1 teaspoon baking powder
- 1/4 teaspoon baking soda
- 1/2 teaspoon salt
- 6 Tablespoons (85g) unsalted butter, softened to room temperature
- 3/4 cup (150g) granulated sugar
- 2 large egg whites, at room temperature
- 1/3 cup (80g) sour cream, at room temperature
- 1 teaspoon pure vanilla extract
- 1/3 cup (80ml) whole milk, at room temperature
- 1/2 cup (70g) sprinkles
- 3/4 cup (12 Tbsp; 170g) unsalted butter, softened to room temperature
- 3 cups (360g) confectioners’ sugar
- 3 Tablespoons (45ml) heavy cream, half-and-half, or whole milk, at room temperature
- 1 teaspoon pure vanilla extract
- salt, to taste
optional: sprinkles for garnish
Preheat oven to 350°F (177°C). Grease a 9×2 inch round cake pan, line with a parchment paper round (see #6 in Cake Baking Tips), then grease the parchment paper. Parchment paper helps the cake seamlessly release from the pan. I recommend using nonstick spray for greasing.
Make the cake: Whisk the cake flour, baking powder, baking soda, and salt together. Set aside.
Using a handheld or stand mixer fitted with a paddle or whisk attachment, beat the butter on high speed until smooth and creamy, about 1 minute. Add the sugar and beat on high speed until creamed together, about 1 minute. Scrape down the sides and up the bottom of the bowl with a rubber spatula as needed. On high speed, beat in the egg whites until combined, then beat in the sour cream and vanilla extract. Scrape down the sides and up the bottom of the bowl as needed. Pour the dry ingredients into the wet ingredients. Turn the mixer to low speed and as the mixer runs, slowly pour in the milk. Beat on low speed just until all of the ingredients are combined. Do not over-mix. You may need to whisk it all by hand to make sure there are no lumps at the bottom of the bowl. The batter will be slightly thick. Gently fold in the sprinkles.
Pour batter evenly into prepared cake pan.
Bake for around 27-31 minutes or until the cake is baked through. After about 18 minutes, tent the cake with aluminum foil to prevent the top and edges from over-browning. To test the cake for doneness, insert a toothpick into the center of the cake. If it comes out clean, it’s done.
Allow cake to cool completely in the pan set on a wire rack. The cake must be completely cool before frosting.
Make the buttercream: With a handheld or stand mixer fitted with a paddle attachment, beat the butter on medium speed until creamy, about 1 minute. Add the confectioners’ sugar, heavy cream, and vanilla extract. Beat on low speed for 30 seconds, then increase to medium-high speed and beat for 2 full minutes. Add up to 1/4 cup (30g) more confectioners’ sugar if frosting is too thin or a splash of heavy cream if frosting is too thick. Add a pinch of salt if frosting is too sweet. (I add a small pinch.)
Spread frosting all over the top. I always use an icing spatula. Top with sprinkles, if desired.
Cover leftover cake tightly and store at room temperature for up to 1 day or in the refrigerator for up to 5 days.
Make Ahead & Freezing Instructions: Prepare cake through step 6. Wrap the baked and cooled cake tightly and keep at room temperature for 1 day or freeze up to 3 months. Bring to room temperature (if frozen) then continue with step 7. Frosting can also be made 1 day ahead of time. Cover tightly and refrigerate overnight. Bring frosting to room temperature, then beat the frosting on medium speed for a few seconds so it’s creamy again. Adding a splash of cream/milk will help thin the frosting out, if needed. Frosted cake freezes well, up to 3 months. Thaw overnight in the refrigerator, then bring to room temperature or serve cold. See How to Freeze Cakes.
Other Size Cakes: See details above the recipe.
Best Sprinkles to Use: See details above the recipe.
Old Recipe: The current cake recipe was updated in 2020. If you loved the old cake batter recipe, originally published in 2013, here it is: Follow step 1 in the recipe above, but use a 9-inch springform pan instead of a regular 9-inch cake pan (too small for the following batter). For the cake batter, whisk 1 and 2/3 cups (210g) all-purpose flour, 1/2 teaspoon baking powder, 1/4 teaspoon baking soda, and 1/2 teaspoon salt together. In a separate bowl, whisk 1/2 cup (115g) melted unsalted butter, 3/4 cup (150g) granulated sugar, 1/4 cup (50g) packed light or dark brown sugar, 1 large egg, 1/4 cup (60g) yogurt or sour cream, 3/4 cup (180ml) milk, and 1 Tablespoon vanilla extract together. Whisk wet and dry ingredients together until smooth. Fold in 2/3 cup (90g) sprinkles. Continue with step 4 in the recipe above and extend the bake time to 33-37 minutes.
Cake Flour: If you can’t get your hands on cake flour, use this cake flour substitute. I suggest doing this 2x, then remove 1/2 cup since you need 1 and 1/2 cups in this recipe.
Sour Cream & Milk: Full fat sour cream and whole milk are strongly recommended for the best taste and texture. A full fat plain yogurt would work instead of the sour cream, though the cake may not taste as tender. Same goes with a lower fat or nondairy milk.
Heavy Cream in Buttercream: I love using heavy cream for the creamiest consistency. You can use half-and-half or whole milk instead if needed. The lower the fat, the less creamy your buttercream will be. Whichever you use, make sure it’s at room temperature. Otherwise your frosting could separate or appear grainy.
Why is everything at room temperature? All refrigerated items should be at room temperature so the batter mixes together easily and evenly. Read here for more information.