The New High Altitude Cookbook recommends 25 percent less leavening agent at 2,000 feet [600 m] extending up to 75 percent less at 8,000 feet [2,000 m].
The New High Altitude Cookbook merekomendasikan 25 persen lebih sedikit ragi atau baking powder pada ketinggian 600 meter dan 75 persen lebih sedikit pada ketinggian 2.000 meter.