01 -
Puree the hulled strawberries in a blender or food processor until smooth. Pour the mixture into a small saucepan and simmer over medium heat, stirring occasionally, until it reduces to half the volume and thickens slightly. This should yield about 1 cup of strawberry puree. Save some for both the cake batter and frosting.
02 -
Set your oven to 350°F (175°C). Grease two 9-inch round cake pans and line the bottoms with parchment paper.
03 -
In a large bowl, beat the softened butter, vegetable oil, and sugar until light and fluffy (around 2 minutes). Add 1 cup of the strawberry puree, sour cream, vanilla extract, and strawberry extract to the mixture. Set aside the remaining puree for the frosting.
04 -
In a separate small bowl, whisk the buttermilk and eggs together until fully combined.
05 -
In another bowl, whisk together cake flour, baking powder, and salt to create a dry mixture.
06 -
Add one-third of the dry ingredients to the butter mixture and mix until just incorporated. Alternate with half of the buttermilk mixture, repeating until all ingredients are combined. Do not overmix. Add pink food coloring, one drop at a time, to achieve the desired shade.
07 -
Divide the batter evenly into the prepared pans and bake for 25–30 minutes. When a toothpick inserted into the center comes out clean, remove from the oven. Cool the cakes for 5 minutes in the pans before transferring them to a wire rack to cool completely.
08 -
Whip the heavy cream and vanilla extract in a large bowl until soft peaks begin to form. Gradually add the strawberry gelatin mix and continue whipping. Slowly add 1/2 cup of powdered sugar until stiff peaks form.
09 -
In a separate bowl, beat the softened cream cheese, mascarpone cheese, and reserved strawberry puree until smooth. Add the remaining powdered sugar and mix until the frosting is creamy and fully combined.
10 -
Gently fold the whipped cream into the cheese mixture until fully integrated. Ensure there are no streaks left in the frosting.