Ingredients
Cake
- 2 ¼ cup cake flour
- 1 ½ cups granulated sugar
- 2 teaspoons baking powder
- ½ teaspoon baking soda
- ½ teaspoon salt
- 1 cup buttermilk
- ¼ cup milk
- 1 tablespoon vanilla extract
- ½ cup vegetable oil
- 3 large eggs, room temperature
Cream Filling (Ermine Frosting)
- 1 ½ cup granulated sugar
- ½ cup flour
- 2 cups milk
- 2 cups unsalted butter, room temperature
- 2 tablespoons vanilla extract
- 1-2 dashes salt
Instructions
- Prepare the Cake Batter: Preheat your oven to 350°F (175°C) and grease a 9×13 inch baking pan with baking spray. In a medium bowl, whisk together the dry ingredients: cake flour, granulated sugar, baking powder, baking soda, and salt. In a large bowl, whisk the wet ingredients: buttermilk, milk, vanilla extract, vegetable oil, and eggs. Gradually add the dry ingredients to the wet mixture, whisking until just combined to form a smooth batter.
- Bake the Cake: Pour the batter into the prepared pan, spreading evenly. Bake in the preheated oven for 35-40 minutes or until a toothpick inserted into the center comes out clean. Remove from the oven and allow to cool completely. Once cooled, invert the cake on a cooling rack and carefully slice horizontally through the middle to create two even layers.
- Make the Cream Filling (Ermine Frosting): In a medium saucepan, combine flour, sugar, and milk. Cook over medium heat, whisking constantly until the mixture thickens to a pudding-like consistency, about 10 minutes. Remove from heat and transfer to a heat-proof bowl. Cover the surface with plastic wrap directly on top to prevent skin from forming. Chill in the refrigerator for 40 minutes until fully cooled.
- Whip the Butter: Place the room temperature unsalted butter in a stand mixer fitted with the whisk attachment. Beat on medium-high speed for about 8 minutes until the butter becomes light and fluffy.
- Combine Pudding and Butter: Using the paddle attachment, add the chilled flour mixture to the whipped butter in small scoops, beating well after each addition. Scrape down the bowl to ensure even mixing.
- Finish the Frosting: Add vanilla extract and salt to the frosting and beat on medium-high speed for 10-13 minutes until the frosting is smooth, fluffy, and creamy.
- Assemble the Cake: Spread an even layer of the Ermine frosting between the two cake layers and smooth the sides for a clean finish. Chill the cake slightly to set the filling before serving.
Notes
- Room temperature ingredients help ensure a smooth batter and better rise.
- Be sure to cover the hot pudding mixture tightly with plastic wrap to avoid skin forming on the custard.
- The Ermine frosting is less sweet than traditional buttercream, giving a balanced taste with the cake.
- You can store the cake in the refrigerator for up to 3 days; bring to room temperature before serving for the best texture.
- Use a serrated knife and a gentle sawing motion to slice the cake layers evenly.
- Prep Time: 45 minutes
- Cook Time: 50 minutes
- Category: Dessert
- Method: Baking
- Cuisine: American