Blackberry Lemon Sponge Cake

I had wanted to make this blackberry lemon cake for two months ever since I saw it on website Natasha's Kitchen. It looked so beautiful and delicious that I knew it had to be my next cake for the monthly event at work. I wasn't able to perfect the sponge cake in her recipe so I substituted a Victoria sponge instead.  The final results looked and tasted wonderful! The layers of cake were brushed with a mixture of lemon juice, sugar, and water. The frosting is a cream cheese buttercream colored and flavored with blackberry puree.