不建议用漂白过的面粉，都是用化学物质漂白的，买Costco的 king Arthur面粉

Usual flour bleaching agents are:

• Organic peroxides (benzoyl peroxide)
• Calcium peroxide
• Chlorine
• Chlorine dioxide
• Azodicarbonamide
• Nitrogen dioxide
• Atmospheric oxygen, used during natural aging of flour