Before baking. I've molded the numbers and imbedded goodies into them.
Post-baking but pre-decorating.
We have a Christmastime tradition in my household: baking gingerbread. Each person molds, bakes, and decorates his/her gingerbread into an edible art piece that represents something about the past year. Gingerbread was the perfect "canvas" for representing my 365-Day Creating Challenge!