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White chocolate and plum layer cake

A white chocolate cake , filled with a spiced plum compote and frosted with white chocolate ermine frosting!

Ingredients
  

For the white chocolate cake

  • 3 eggs
  • 150 grams or 3/4 cup granulated sugar
  • 1 tsp vanilla extract
  • 170 grams or 3/4 cup chopped white chocolate
  • 180 ml or ¾ cup milk
  • 85 grams or 6 tablespoons unsalted butter
  • 190 grams or 1 ½ cups all purpose flour
  • 1 ½ tsp baking powder
  • ½ tsp salt

For the spiced plum compote

  • 4 plums
  • juice of 1 lime about 2 tablespoons
  • 50 grams or 1/4 cup granulated or castor sugar
  • Pinch of clove powder optional
  • 1 cinnamon stick optional
  • 1 tsp vanilla extract

For the white chocolate ermine frosting

  • 35 grams or 4½ tablespoons all-purpose flour
  • 200 grams or 1 cup granulated sugar
  • 240 ml or 1 cup milk
  • 1/4 tsp salt
  • 226 grams or 1 cup unsalted butter softened at room temperature
  • ½ teaspoon vanilla extract
  • 100 grams white chocolate

Instructions
 

To make the white chocolate sponge cake

  • Preheat oven to 160 ℃ or 325 ℃ . Grease an 7 inch round pan with butter , dust with flour and line the bottom with parchment .
  • In a saucepan , heat chopped chocolate , cubed butter and milk together until the chocolate n butter have melted. Keep warm.
  • Whisk together the flour, salt and baking powder . Keep aside.
  • Using an electric mixer or whisk, whip the eggs with the sugar and vanilla until triple in volume and pale in colour . If you lift your beater or whisk and draw an eight on the top of the batter , you should be able to see the whole 8 before it disappears.
  • Add the flour mixture and beat on low until combined.
  • Add the chocolate-butter-milk mixture and beat until smooth.
  • Pour batter into prepared pan .
  • Bake for 40- 50 minutes until a toothpick inserted in the centre comes out dry. The top will be golden brown and edges will be coming away from the sides.
  • Cool in pan for ten minutes and gently unmould. Cool completely.

To make the spiced plum compote

  • Remove the pits from the plums and chop them fine. Do not peel !
  • In a thick bottomed saucepan, add the chopped plums, lime juice, sugar and spices.
  • Bring to boil , until all the sugar dissolves.
  • Lower the heaat and continue cooking , stirring occasionally until the mixture becomes thick. The plums will break down and soften. Check for taste and add sugar / lime juice as needed.
  • Once it reaches desired consistency , take off heat , remove the cinnamon stick and stir in the vanilla .
  • Cool to room temperature before using.

To make the white chocolate ermine frosting

  • Whisk together flour, sugar and salt in a saucepan.
  • Add the milk and whisk until combined
  • Place saucepan over low heat and whisk continuously as the mixture comes to a boil
  • Once it boils , cook for 1-2 minutes, then take the pan off the heat and whisk for a minute or so. It should be lump free and smooth
  • Transfer the pudding into another bowl or plate . Cover it with plastic wrap, pressing the plastic wrap directly onto the pudding. This prevents a skin from forming. Let the pudding to cool to room temperature
  • Once the pudding is cool, beat the butter until fluffy and pale,.This will take 5-10 minutes using an electric mixer and much longer using a wooden spoon or whisk ( but doable).
  • Once the butter is really smooth and pale (important!) , add the cooled pudding one tablespoon at a time, mixing or beating well after each addition
  • After all the pudding has been added, mix or beat for another 3-5 minutes. The buttercream should be smooth and creamy.
  • Melt the white chocolate and mix into the frosting !

To assemble the cake

  • Slice cooled cake into three horizontally using a serrated knife.
  • Place one layer on a cake board or plate.
  • Spread about 1/4 cup frosting on top. This is so that the compote doesnt seep into the cake.
  • Using a piping bag with a round tip or corner cut off , pipe a ring of frosting along the outer edge of the cake layer. This acts as a dam so the compote doesnt seep into your outside frosting.
  • Spread half of the compote on the layer within the frosting dam.
  • Place the next layer on top , press gently . Spread buttercream, dam and spread compote as above.
  • Place the last layer. Press gently.
  • Place about one cup of buttercream on top . and using a spatula , spread on the top and sides of the cake as smoothly as possible.
  • Chill for some time.
  • Now, smoothen the frosting further and pipe / decorate as you wish !

Notes

This cake will last for about 3-4 days in the refrigerator but get it to room temperature before serving.
You can puree the plums if you want a smooth compote.
The spices in the compote are optional. As is the white chocolate in the frosting.
This cake bakes up with a crust . If you want to avoid a dark crust , bake in a larger pan or in 2 pans.
My measuring cup is 240 ml.