Grease & line the bottom and sides of a 20cm Springform round baking tin with baking paper
Place butter, white chocolate, milk, sugar and vanilla essence in a saucepan on medium heat. Cook while stirring for about 5 minutes or until all ingredients have melted and combined into a smooth mixture. Set aside to cool for 25 minutes.
Preheat oven to 140°C (fan forced)
Sift both flours into a large bowl.
Add chocolate mixture from the saucepan and eggs into the bowl with the flour.
Stir with a wooden spoon until well combined.
Fold 1/2 of violet crumble pieces into the mixture. Set aside the other half for the top of the cake.
Pour mixture into baking tin and cook in oven for approx 1 hour 45 minutes to 2 hours. Cook until a skewer inserted into the centre of the cake has moist crumbs clinging.
Cool in pan for 15 minutes before turning out on a wire rack to finish cooling
Cut cake in half with a serrated knife and spread the ganache filling over the base.
Place second half of cake bake on top and spread the remaining ganache over the top of the cake.
Place in refrigerator to set
Place remaining violet crumble pieces onto the ganache layer on top of the cake
White Chocolate Ganache Filling
Combine chocolate and cream in a heatproof bowl and microwave on high for 1 minute. After the first 30 seconds remove from microwave and stir. Put back in microwave for remaining 30 seconds. You should then be able to stir the chocolate until a smooth mixture is achieved.
Place in refrigerator for at least 1 hour to allow ganache to set and thicken before icing the cake.
Once set, remove the ganache from the refrigerator and using an electric mixer, beta the ganache until it is light and fluffy
White Chocolate Ganche for Top of Cake
Follow the same instructions as for the ganache filling.