[header] How to flatten chicken [title] Cut thick chicken breasts. [step] If you are working with especially thick breasts, it will make your job easier if you cut them before flattening them. Using a sharp knife, cut them horizontally. 
You can cut it all the way through, leaving you with two separate pieces, or you can cut it almost all the way through and then open it like a book. [title] Place the thawed chicken breast between wax paper or plastic wrap.