Dreaming about opening the cupboard illustrates what is actually hiding deep inside yourself and no-one else knows about. The things that denote other parts of yourself beyond what the outside world can see will shortly be brought to the surface for everyone to see. The dream implies that you are uncovering your own skills, truths, and finding ways to make changes in yourself.
Also, perusing the cupboard’s contents in a dream suggests a path to becoming self sufficient in cooking. Let your recipes and creations run free as you explore the cupboards where you can view and play with what the contents have given you.