1- Yeast is accepted as a substance which both lightens food and makes it palatable. At the same time it changes the substance and texture. In dreams it represents ideas or influences which can irrevocably change our lives or situations, often for the better.
2- Yeast ferments and thus it becomes one of the symbols of growth and unconditional love.
3- Yeast can be symbolic of the steady growth towards the realisation and beauty of natural love.... Ten Thousand Dream Dictionary
Dreams of yeast represent that you are realizing that in which you invest your energy will raise, grow, and manifest. You have the ability to lift off, perk up and rise above your circumstances.... Strangest Dream Explanations
Seeing a bowl of uncooked dough could also be a warning to watch out for the leaven. Jesus says it well in this Scripture: • Matthew 16:6 Then Jesus said to them, Take heed and beware of the leaven of the Pharisees and of the Sadducees.
• In this case, leaven is seen as legalism, works and false teaching. Just one part of leavens, leavens the whole dough.