Water Roux - Tangzhong Starter / 汤种制作

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A Tangzhong starter / Water roux starter is a mixture of flour and water. That is to combine together one portion of bread flour and five portions of water by weight in a pot. Heat up the mixture to bring out the gelatinization of starch in flour. What makes the bread baked with this kind of starter difference is Starch Gelatinization, which helps to engage more water, namely more water will be absorbed, to provide a characteristic softer, more elastic-textured bread. Moreover, the bread will have long-lasting freshness.
In a bowl, whisk together the water and the flour until the mixture is well blended and lump free. Stir the mixture while it cooks over the medium heat to reach 65C/150F. It takes about 2-3 minutes.
Remove from heat and cover loosely with plastic wrap to prevent from drying. Store the starter in the refrigerator after completely cooling down. To use the starter, measure out the amount called for in a recipe and let it warm to room temperature. Unlike sourdough starter, this special Tangzhong starter doesn't improve its flavour with age. So it's preferably to use up in 3 days.

汤种意思为温热或是稀的面种。汤的意思有开水，热水之意，种为种子，面肥种之意。用在烘焙上就解释为将面粉加水加热，使产生淀粉糊化。或者将面粉假如不同温度的热水时其糊化。此糊化的面糊成为汤种。用汤种来烘焙面包好处就在于淀粉糊化使吸水量增多，因此面包的组织柔软，且有弹性，可延缓老化。
混合面粉和水在一个小锅里。搅拌至粉水完全混合，没有粉粒为止。置于炉上，中火加热到65C/150F，差不多需要2-3分钟。
盖上保鲜膜保湿，凉透后放到冰箱保存。使用时按需取出汤种，回至室温后才使用。汤种不像其它面种越久越好，最好是不要超过3天使用完。

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