1, 15~20 minutes. It takes 20 minutes to steam Sophora japonica in ordinary pot and 15 minutes to steam Sophora japonica in pressure cooker.

2. steamed acacia flowers should not be too short, which is not easy to ripen. Otherwise, the fragrance of acacia flowers will diverge, which will not only affect the fragrance of acacia flowers themselves, but also seriously affect the taste. The acacia flowers should be half-opened, so the taste is more refreshing. The moisture content of steamed Sophora japonica should not be too much, which will lead to poor taste.