When should I start to teach my daughter to bake?

I just let her help out when she was 2 years. Except for putting the batter into the oven, I allowed her to add in the ingredients. So long as the child shows an interest, I do not forsee any other hinderance in letting the child learn to bake. I even allowed my 2 year old to fry her own egg with assistance. You would be amazed how apt they are with their motor skills and learning through experience.