Sponge mixture by Cake and Cookie recipes on June 12th, 2012 · without comments Victoria sponge mixture in a glass bowl. The mixture is modified slightly from a standard Victoria sponge by including lemon juice and lemon zest, for use as the sponge in making a fresh lemon curd cake.Share: Share on Facebook Share on Twitter Share on Google+ Share on LinkedIn™ Share on Pinterest Home-made Lemon Curd Cake Recipe Leave a Reply Click here to cancel reply. Name (required) Mail (will not be published) (required) Website