[header] How to bake soft cookies [title] Use cake flour instead of all-purpose flour. [step] Cake flour has a lower protein content than standard flour, so the cookies will stay puffed and fluffy. If you use bread or all-purpose flour, you'll end up with crispier, flatter cookies. 
You can replace all of the all-purpose flour with cake flour. [title] Try shortening or margarine instead of butter.