Preheat your oven to 350°F (175°C). Grease two 8-inch round cake pans and line the bottoms with parchment paper.
In a saucepan, melt the chopped white chocolate with hot water over low heat until smooth. Allow to cool slightly.
In a mixing bowl, cream together the butter and granulated sugar until light and fluffy. Add eggs, vanilla, salt, baking soda, and baking powder, mixing until combined.
Gradually add the flour, alternating with buttermilk, mixing until just combined. Stir in the cooled melted white chocolate.
Divide the batter evenly between the prepared pans and smooth the tops. Bake for 25-30 minutes or until a toothpick comes out clean.
Allow the cakes to cool in the pans for 10 minutes, then turn out onto wire racks to cool completely.
For the frosting, melt the white chocolate in the microwave, stirring every 30 seconds until smooth. Let it cool slightly.
In a mixing bowl, beat the butter until creamy. Gradually add powdered sugar and mix until smooth. Add the cooled white chocolate and beat until fluffy.
To assemble, place one cake layer on a serving platter, spread with strawberry jam, and top with frosting. Add the second layer and frost the top and sides.
Garnish with additional white chocolate shavings or berries if desired. Serve and enjoy!
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Notes
Store leftovers in an airtight container in the refrigerator for up to a week. Bring to room temperature before serving.