Delicate Fruit Whisper Cake

1. Preheat Oven and Prepare Pans

Preheat your oven to 350°F (175°C). Grease three 9-inch round cake pans with butter and lightly dust them with cake flour. Place parchment paper rounds at the bottom of each pan.

2. Cream Butter, Sugar, and Oil

In a stand mixer fitted with the paddle attachment, cream together the unsalted butter, granulated sugar, and vegetable oil on medium speed for about a minute, until light and fluffy.

3. Add Eggs and Yolks

Add the large eggs one at a time, followed by the egg yolks, ensuring each is fully incorporated before adding the next.

4. Add Sour Cream and Vanilla

Add the sour cream and vanilla extract to the mixture. Beat on medium speed for 2-3 minutes until creamy and slightly fluffy.

5. Combine Dry Ingredients

In a separate bowl, whisk together the cake flour, baking powder, and fine sea salt.

6. Combine Wet and Dry Ingredients

Gradually add the dry ingredients to the wet mixture in three parts, alternating with the buttermilk. Start and end with the dry ingredients, mixing on low speed until just combined.

7. Divide and Bake

Divide the batter evenly among the prepared cake pans. Gently tap the pans on the counter to remove any air bubbles. Bake in the preheated oven for 15-18 minutes, until the edges are lightly browned and a toothpick inserted into the center comes out clean.

8. Cool the Cakes

Allow the cake layers to cool in the pans for about 10 minutes before transferring them to a cooling rack. Let them cool completely on the rack for about an hour.