Ntau tus niam tsev tsis siv cov hmoov ci rau ci, tab sis dej qab zib, slaked nrog vinegar los yog kua txiv qaub. Thiab yog hais tias lub khob noom cookie muaj cov khoom xyaw acidic, piv txwv li, kefir lossis qaub cream, koj tuaj yeem siv dej qab zib xwb. Tab sis baking soda nws tus kheej yog cov hmoov ci tsis zoo. Thaum rhuab, nws tawm carbon dioxide, tab sis nws yuav tsis txaus kom lub khob noom cookie fluffy. Thiab cov dej qab zib seem yuav lwj qhov saj thiab xim ntawm cov khoom ci.
Yuav kom nce lub khob noom cookie, dej qab zib yuav tsum tau muab tua nrog vinegar los yog txiv qaub kua txiv. Yog lawm, feem ntau ntawm cov pa roj carbon dioxide evaporates tam sim ntawd ntawm ib rab diav, tab sis tseem, vim tias muaj ntau cov kua txiv hmab txiv ntoo lossis kua txiv hmab txiv ntoo ntau dua li dej qab zib, cov tshuaj tiv thaiv tseem tshwm sim thaum lub sijhawm ci. Yog li ntawd, koj yuav tau txais fluffy thiab mos pastries.