Sponge Cupcake Recipes Sponge Cupcake with Salted Egg Yolk keepupcooking.com These little sponge cupcake with salted egg yolk, pork floss and a luscious egg yolk sauce, are a beloved fusion of savory and sweet, soft and rich, traditional and modern. submitted by KeepUpCooking salted egg yolk sponge cupcake Entry Permalink Report Post