Blend butter, peanut butter, and sugars until creamy. Beat in egg, and add flour, soda, ... of the tray. Microwave at medium high (level 7) ... to decorate, if desired.
Add powder sugar, cocoa, milk & vanilla in bowl. DO NOT STIR. Put stick of butter in center of bowl. Microwave for 2 1/2 min. remove ... into pan and refrigerate.