Growing Cupcake Trend: Cupcakes In A Jar

Vanilla Cupcakes In A Jar by Cakes By Chichi. Cupcakes in jar are gaining in popularity. Many bakeries are doing this, and the cupcakes are more like a parfait. I wonder if the expense of using Mason jars is cost effective. Bakers, if you are doing cupcakes in jars, how much do you charge per cupcakes?  Is it more than a regular cupcake?