Elegant Vanilla Layer Cake with Creamy White Chocolate Frosting

This is the ultimate vanilla cake. It’s not just a cake, it’s a celebration. This recipe creates two wonderfully moist, light, and fluffy vanilla cake layers, thanks to a combination of butter, oil, and a touch of sour cream or yogurt. The subtle sweetness of the cake is perfectly matched by a rich and velvety white chocolate frosting, which is incredibly smooth and easy to work with. Topped with delicate white chocolate curls and fresh berries, this cake is perfect for weddings, birthdays, or any special occasion.

Why This Cake is a Crowd-Pleaser

• Perfect Crumb: The combination of butter for flavor and oil for moisture creates a cake that is both rich and unbelievably tender.
• Balanced Sweetness: The frosting isn’t overly sweet, allowing the nuanced flavor of the white chocolate to shine through.
• Versatile and Customizable: The simple, classic vanilla base can be paired with any filling or topping, but the white chocolate frosting and fresh berries are a perfect match.
• Visually Stunning: The pure white color of the cake and frosting, accented by fresh berries and white chocolate curls, makes for a breathtaking presentation.

Ingredients

All measurements are provided in US customary and metric units.

For the Vanilla Cake Layers:

• All-Purpose Flour: 2 ½ cups (300g)
• Baking Powder: 2 teaspoons
• Baking Soda: ½ teaspoon
• Salt: ½ teaspoon
• Unsalted Butter: ½ cup (113g), softened to room temperature
• Granulated Sugar: 1 ½ cups (300g)
• Vegetable Oil: ½ cup (120ml)
• Large Eggs: 3, room temperature
• Vanilla Extract: 2 teaspoons
• Sour Cream or Plain Greek Yogurt: ½ cup (120g), room temperature
• Buttermilk or Whole Milk: 1 ¼ cups (300ml), room temperature

For the Creamy White Chocolate Frosting:

• Unsalted Butter: 1 cup (226g), softened to room temperature
• White Chocolate: 8 ounces (226g), high-quality baking chocolate, chopped
• Powdered Sugar (Confectioners’ Sugar): 2 ½ – 3 cups (300-360g), sifted
• Heavy Cream or Milk: 2-4 tablespoons
• Vanilla Extract: 1 teaspoon
• Pinch of Salt

For the Garnish (Optional):

• Fresh Berries: 1 cup (150g) – raspberries, blueberries, or strawberries work well
• White Chocolate Curls: made by scraping a block of white chocolate with a vegetable peeler

Step-by-Step Instructions

Follow these detailed steps for a beautifully baked and frosted cake.

Step 1: Prepare the Oven and Pans

1. Preheat your oven to 350°F (175°C).
2. Grease and flour two 9-inch round cake pans. Line the bottoms with a round of parchment paper for easy removal.

Step 2: Combine Dry Ingredients

1. In a medium bowl, whisk together the all-purpose flour, baking powder, baking soda, and salt. Set aside.

Step 3: Cream Butter, Sugar, and Oil

1. In the bowl of a stand mixer fitted with the paddle attachment (or a large bowl with a hand mixer), beat the softened butter, granulated sugar, and vegetable oil on medium-high speed for 3-4 minutes, until the mixture is light and fluffy.
2. Scrape down the sides of the bowl as needed.

Step 4: Add Eggs and Vanilla

1. Add the eggs one at a time, beating well after each addition until fully incorporated.
2. Beat in the vanilla extract and sour cream or yogurt. Mix until the batter is smooth.

Step 5: Alternate Wet and Dry Ingredients

1. With the mixer on low speed, add about one-third of the dry ingredients to the wet mixture and mix until just combined.
2. Add half of the buttermilk and mix until incorporated.
3. Repeat with the second third of the dry ingredients, then the remaining buttermilk, and finally the last of the dry ingredients. Mix until just combined. Do not overmix!

Step 6: Bake the Cake

1. Divide the batter evenly between the two prepared cake pans.
2. Bake for 30-35 minutes, or until a wooden skewer or toothpick inserted into the center of each cake comes out clean.
3. Let the cakes cool in the pans on a wire rack for 15 minutes before inverting them onto the rack to cool completely. The cakes must be completely cool before frosting.

Step 7: Make the White Chocolate Frosting

1. Melt the chopped white chocolate in a double boiler or a microwave-safe bowl in 30-second intervals, stirring in between, until it is completely smooth. Let it cool to room temperature.
2. In the bowl of a stand mixer (or a large bowl with a hand mixer), beat the softened butter on medium-high speed until it is light and fluffy, about 2 minutes.
3. Add the cooled, melted white chocolate to the butter and beat until fully combined.
4. Gradually add the sifted powdered sugar, mixing on low speed until combined.
5. Add the vanilla extract and a pinch of salt.
6. Beat on medium-high speed for 2-3 minutes until the frosting is light and creamy. If the frosting is too thick, add heavy cream or milk, 1 tablespoon at a time, until you reach your desired consistency.

Step 8: Assemble and Decorate

1. Place one cooled cake layer on a serving platter or cake stand.
2. Spread about one-third of the white chocolate frosting evenly over the top of the first layer.
3. Carefully place the second cake layer on top.
4. Use an offset spatula to spread the remaining frosting over the top and sides of the cake, smoothing it out for an elegant finish.
5. Garnish the top of the cake with fresh berries and white chocolate curls.

Step 9: Serve and Store

1. Slice and serve the cake at room temperature.
2. Store any leftovers in an airtight container at room temperature for up to 3 days or in the refrigerator for up to a week. If refrigerated, let it sit out for 30 minutes before serving.

Tips for Success

• High-Quality White Chocolate: Using a good quality white chocolate bar, rather than white chocolate chips, will give you a superior flavor and a smoother frosting.
• Sift Powdered Sugar: This is essential for a lump-free frosting.
• Don’t Overmix: Overmixing the cake batter will develop gluten, which can lead to a tough cake.
• Cool Completely: Frosting a warm cake will cause the frosting to melt and make a mess. Be patient!