Ingredients
Raspberry Jam
- 24 oz (680 g) frozen raspberries
- 3/4 cup (150 g) granulated white sugar
- 2 1/4 tsp (6 g) cornstarch
White Cake
- 2 1/2 cups (280 g) cake flour, spooned and leveled
- 1 1/2 tsp baking powder
- 1/4 tsp baking soda
- 1/2 tsp salt
- 10 tbsp (140 g) unsalted butter, softened
- 1 1/2 cups (300 g) granulated white sugar
- 4 egg whites, at room temperature
- 1 tbsp vanilla bean paste
- 1 cup (240 ml) buttermilk, at room temperature
- 1/3 cup (80 ml) half & half, or whole milk
- 1/3 cup (100 g / 80 ml) sweetened condensed milk
- 1/2 tbsp vanilla bean paste
White Chocolate Raspberry Cream Cheese Frosting
- 1 cup (224 g) unsalted butter, softened
- 4 oz (113 g) cream cheese, cold
- 6 oz (170 g) white chocolate bar, melted and slightly cooled
- 1 1/2 cups (195 g) powdered sugar
- 1/4 cup (60 ml) raspberry jam from above
- 2 tbsp raspberry jam from above, for swirling into the frosting
Instructions
- Make the Raspberry Jam: Add the frozen raspberries to a medium saucepan over medium heat. Cook for about 10 minutes, stirring and mashing occasionally, until the raspberries begin to break down and become liquidy.
- Strain the Raspberries: Pass the cooked raspberries through a sieve to remove the seeds. You should end up with just under 2 cups (480 ml) of raspberry liquid.
- Cook the Jam: Return the raspberry liquid to the saucepan off the heat and whisk in cornstarch and sugar. Heat the mixture over medium heat for about 25 minutes until thickened, yielding 1 1/2 cups (360 ml) of jam. Transfer to a small bowl and chill.
- Preheat and Prepare Pan: Preheat oven to 350℉ (175 ℃). Grease a 9×9 inch pan and line it with parchment paper.
- Mix Dry Ingredients: In a medium bowl, whisk together cake flour, baking powder, baking soda, and salt. Set aside.
- Cream Butter and Sugar: In a large bowl, cream the softened butter and granulated sugar using an electric mixer for 2 minutes until light and fluffy.
- Add Egg Whites and Vanilla: Mix in the egg whites and vanilla bean paste on medium speed until pale and smooth, about 1 minute.
- Combine Wet and Dry: Alternately add the dry ingredients and buttermilk to the wet mixture on low speed, mixing until combined. Scrape sides of bowl with rubber spatula as needed.
- Bake the Cake: Pour batter into prepared pan and bake for 35-40 minutes or until a toothpick inserted in center comes out clean.
- Cool the Cake: Let cake cool in pan on wire rack for 30 minutes. Then carefully lift cake out with parchment paper and cool completely on the wire rack.
- Prepare Vanilla Milk Soak: Whisk half & half, sweetened condensed milk, and vanilla bean paste together in a measuring cup. Chill until ready to use.
- Make the Frosting: Beat butter in a large bowl on high speed until pale and fluffy, about 5 minutes. Add cream cheese and mix until fluffy, about 1 minute. Add melted white chocolate and mix on medium speed until combined.
- Add Raspberry Jam and Sugar: Mix in 1/4 cup raspberry jam, then sift in powdered sugar. Mix on low to combine and then high speed for 1 minute until fluffy.
- Prepare Cake for Assembly: Once cooled, trim a very thin layer off the top of the cake to help absorb the milk soak. Place cake on serving plate and poke holes across the surface using a wooden stick or spoon handle.
- Soak the Cake: Slowly pour the vanilla milk soak over the cake, allowing it to absorb through the holes. Be patient for even soaking.
- Inject Raspberry Jam: Reserve 2 tbsp of jam, then fill a piping bag with the remaining jam. Pipe jam into the holes, allowing some to spill out. Use an offset spatula to spread jam evenly over the cake surface.
- Frost the Cake: Spread a thick layer of the white chocolate raspberry cream cheese frosting over the jam-covered cake using an offset spatula. Swirl the reserved 2 tbsp of raspberry jam into the frosting with the back of a spoon.
- Serve: Cut the cake into 16 slices and serve immediately or chill until ready to serve.
Notes
- Be sure to use room temperature egg whites and buttermilk for the best cake texture.
- Allow the white chocolate to cool slightly before adding to frosting to prevent curdling.
- The cake soak helps keep the cake moist and enhances the flavor with vanilla sweetness.
- Using an offset spatula will make frosting application smooth and even.
- Homemade raspberry jam intensifies the raspberry flavor and avoids added artificial ingredients.
- Store leftovers covered in the refrigerator; bring to room temperature before serving for best texture.
- Prep Time: 30 minutes
- Cook Time: 1 hour 38 minutes
- Category: Dessert
- Method: Baking
- Cuisine: American