Answering the playful, classic greeting "what's cookin good lookin" provides a great opportunity to match the sender's witty and lighthearted energy. You can respond with a clever culinary pun such as "just cooking up some trouble" or "just making magic in the kitchen." Alternatively, you can reply with a cheeky compliment, a deadpan remark about whatever mundane task you happen to be doing at that exact moment, or a smooth counter-flirt to keep the engaging conversation flowing smoothly.