1, the old yeast is the traditional yeast that used to make noodles.

2, clean glass bottle, room temperature water 360 grams, 120 grams of grapes or raisins or other fruits such as strawberries, blueberries, etc., 1 tablespoon of sugar, put room temperature space, remember to twice a day in the morning and evening, open the bottle to add a teaspoon of sugar and shake the glass bottle, 5 to 7 days in the summer will be completed, winter may take 7-10 days.

3, the yeast liquid will start to bubble a lot in the 2nd to 3rd day, which means the yeast is very active and is feeding and reproducing, and it will start to reduce the bubbles in about 5 days, and the grapes or fruits will be floating on the top, and the flavor will change from a strong acidic wine flavor to a light wine aroma. Most fruits are fine, but grapes, raisins, strawberries, blueberries and other fruits are easier to cultivate "Fruit Natural Yeast Liquid" successfully.

4. In summer, it takes about 5 days, in winter, it takes 7 to 10 days to complete the cultivation of the natural yeast fruit liquid, take away the fruits and put them in the lower part of the refrigerator to keep, adding teaspoon of sugar every month, it can be kept for about 5 months

5. At this time, the fruit yeast liquid can be used to make bread directly! If you use the fruit liquid directly to make bread, the yeast liquid accounted for 30%-40% of the recipe flour, of course, the water should be removed from the equal part, because the yeast liquid is also liquid, the total amount of water and yeast liquid is best not to exceed 70% of the recipe flour, the general amount of water accounted for 60-65% of the easier to knead the dough.

6, take 50 grams of the fruit yeast liquid, add 50 grams of gluten flour, add a teaspoon of sugar, mix well and put it at room temperature, about 3-6 hours the total volume will be doubled, this time means that the yeast seed propagation success! Then store it in the refrigerator.

7. On the second day, take out from the refrigerator, repeat the same action as on the first day, take 50g of the fruit yeast liquid, add 50g of gluten flour, add a teaspoon of sugar, mix well and put it at room temperature, about 3-6 hours the total volume will be doubled, and then put it in the refrigerator to store.

8, the third day, still repeat the same action, take 50 grams of fruit yeast liquid, add 50 grams of gluten flour, add a teaspoon of sugar, mix well and put it at room temperature, about 3-6 hours the total volume will be doubled, and then put it in the refrigerator to save.