I was wary about baking cakes in glass jars, I had visions of the jars exploding, leaving multicoloured cake mix all over the kitchen. However they turned out pretty good, well I think so anyways! Here’s how I made them. I used a boxed cake mix for the first time in a long time, as I read that certain cake mixes can brown easily and the colours can turn muddy. I didn’t want to take the risk. I spent quite a bit of money on the jars and gel food colouring, I wanted them to go right the first time, Luckily they did!