This Inside Out cake was for my friend Isaac’s ninth birthday, which is why it’s in the shape of the number 9.
The memories around the edge of the 9 are gelatin bubbles, which are made by dipping partially inflated balloons, coated with shortening, into melted gelatin. They’re surprisingly sturdy once dry and technically edible, though it’s a little like eating plastic.
Each memory bubble contains a picture of the birthday boy, at ages from infancy to now, printed on edible wafer paper and each one has an LED behind it.
The figures are made of modeling chocolate with gum paste hair and clothes. They are made over a wire armature attached to a motor, so that they can spin joyously around.
The actual cake is the memory balls in the middle of the 9, which are cake balls dipped in royal icing and then in colored piping gel. I was trying to make cake that was easy to pick up and eat with no utensils, because the party was outside. But I didn’t leave enough time for the piping gel to dry, so they wound up extremely sticky and messy to eat. Still tasty, though.