Ensure the mixture reaches 65°C (149°F) for optimal gelatinization. If using a thermometer, this is ideal. Otherwise, cook until it forms a thick paste, like a loose paste, not quite a roux. Let it cool completely before adding to your main dough. It can be stored in the fridge for up to 2-3 days, covered with plastic wrap directly on the surface to prevent a skin from forming.
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