As bread is the ‘staff of life’, to dream of kneading bread suggests working hard on our own lives on order that we ourselves can effect change.
Psychological / emotional perspective: Kneading has the same symbolism as cooking: that is, combining ingredients to make something else. It also signifies working with tension to relieve pain as in massage.
Material aspects: In waking life, the act of kneading can be therapeutic. In dreams, this significance can be highlighted, allowing us to work at a problem or resolve a difficulty.