Need to be glad as your child want to help you in the kitchen. Even she want to stir mushroom soup that you still keeping your eyes in it. It show out that she want to explore something new and she open to gain some experience over it.
Moreover, you have to put away your negative hat she still child. Your child is a human and she acted in nature of doing what happen in frond of her.
Be glad that she love to get something new and that show out she can cope up with her life, her future life.