Description
This is the PERFECT white cake with a soft texture, moist crumb, and wonderful vanilla flavor; plus, it tastes incredible with creamy vanilla buttercream. By following the recipe below and all of my success tips, you’ll enjoy an ultra-light cake, just like the kind you find at a bakery or from a box mix. But it’s all made from scratch in your very own kitchen. See various flavors above and all of my recipe Notes below.
Ingredients
- 2 and 1/2 cups (295g) cake flour (spooned & leveled)
- 2 teaspoons baking powder
- 1/2 teaspoon baking soda
- 1 teaspoon salt
- 3/4 cup (12 Tbsp; 170g) unsalted butter, softened to room temperature
- 1 and 3/4 cups (350g) granulated sugar
- 5 large egg whites, at room temperature
- 1/2 cup (120g) full fat sour cream, at room temperature*
- 1 Tablespoon pure vanilla extract (yes, Tbsp!)
- 1 cup (240ml) whole milk, at room temperature*
Vanilla Buttercream
- 1 and 1/4 cups (282g) unsalted butter, softened to room temperature
- 5 cups (600g) confectioners’ sugar
- 1/3 cup (80ml) heavy cream
- 2 teaspoons pure vanilla extract (or use clear imitation vanilla extract for stark white frosting)
- 1/8 teaspoon salt
- optional: sprinkles, for garnish
Instructions
- Preheat the oven to 350°F (177°C). Grease two 9-inch round cake pans, line with parchment paper rounds, then grease the parchment paper. Parchment paper helps the cakes seamlessly release from the pans. (If it’s helpful, see this parchment paper rounds for cakes video & post.)
- 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 for 2 minutes until creamed together. Scrape down the sides and up the bottom of the bowl with a silicone spatula as needed. Add the egg whites. (At this point, it’s best to use the whisk attachment.) Beat on high speed until combined, about 2 minutes. Then beat in the sour cream and vanilla extract. Scrape down the sides and bottom of the bowl as needed. Add the dry ingredients and mix on low speed until just incorporated. With the mixer still running on low, slowly pour in the milk until combined. Do not overmix. 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.
- Pour batter evenly into cake pans. Bake for around 24–25 minutes or until the cakes are baked through. To test for doneness, insert a toothpick into the center of the cake. If it comes out clean, it is done. Allow cakes to cool completely in the pans set on a wire rack. The cakes must be completely cool before frosting and assembling.
- Make the frosting: In a large bowl using a handheld mixer or stand mixer fitted with a whisk or paddle attachment, beat the butter on medium speed until creamy—about 2 minutes. Add confectioners’ sugar, cream, vanilla extract, and salt with the mixer running on low speed. Increase to high speed and beat for 3 full minutes. Add more confectioners’ sugar if frosting is too thin, more cream if frosting is too thick, or a pinch more salt if frosting is too sweet.
- Assemble and frost: First, using a large serrated knife, slice a thin layer off the tops of the cakes to create a flat surface. Discard (or crumble over ice cream!). Place one cake layer on your cake stand, cake turntable, or serving plate. Spread 3/4 to 1 cup of vanilla buttercream in an even layer on top. Top with the second cake layer, upside down, and spread the top and sides with 1 cup of buttercream in a very thin layer to make the crumb coat. If desired, run a bench scraper around the cake to help smooth out the frosting on the sides. Refrigerate the cake until the crumb coat has set, about 20 minutes. Finish by spreading the top and sides with the remaining buttercream. Decorate top of cake with sprinkles, if desired.
- Slice and serve immediately or keep at room temperature for a few hours before serving.
- Cover leftover cake tightly and store in the refrigerator for up to 5 days.
Notes
- Make Ahead & Freezing Instructions: The cake layers can be baked, cooled, and covered tightly at room temperature overnight. Likewise, the frosting can be prepared and then covered and refrigerated overnight. Assemble and frost the cake the next day when you are ready to serve. Frosted cake can be frozen up to 2 months if you have room in the freezer. Thaw overnight in the refrigerator and bring to room temperature before serving.
- Special Tools (affiliate links): 9-inch Round Fat Daddio’s Cake Pans or Wilton Cake Pans | Glass Mixing Bowl | Whisk | Electric Mixer (Handheld or Stand) | Silicone Spatula | Cooling Rack | Cake Turntable | Straight Spatula (for frosting) | Round Cake Carrier (for storage)
- Amount of Batter: If it’s helpful for using different size cake pan sizes and conversions, this recipe yields about 7 cups of cake batter.
- Cake Flour: If you can’t find cake flour, here is a DIY homemade cake flour substitute you can use instead.
- Carton Egg Whites: You can use carton egg whites. The carton should give measurements for substituting for fresh egg whites.
- Milk, Sour Cream, Substituting Buttermilk: Whole milk and sour cream are strongly recommended for the best taste and texture. A full-fat plain yogurt would work instead, though the cake may not be as light. Same goes for a lower-fat milk. If you want to use buttermilk, the best way to do so is to have it replace both the sour cream AND milk in this recipe. Use 1 and 1/2 cups of buttermilk, then leave out the sour cream and whole milk.
- Other Cake Sizes (6-inch, 8-inch, 9×13-inch, tiered cake, Bundt cake, cupcakes): Please see FAQ above the recipe.
- Almond Cake: If you want to add almond flavoring, I recommend using 1.5 teaspoons almond extract and 1.5 teaspoons vanilla extract for an almond cake. I usually just do this to the cake, but you could certainly swap some of the vanilla in the frosting for almond for an even deeper almond flavor. Decorate the cake with sliced almonds, if desired.