Basically, right, it looks likely that Katy Perry's next single is 'Bon Appetit', a song she's 'teased' a couple of times on Snapchat.
The clues involve recipe-based posts on Katy's 'socials', with the sign-off "you may get a surprise":
This morning, meanwhile, she's been on Twitter critiquing fans' efforts.
This looks store bought 🤔 https://t.co/npS3Ut333g
— KATY PERRY (@katyperry) April 25, 2017
So there we are. Some 'teasing' using cake and cooking as a metaphor for of a song likely about sex. You'll know things are really underway when interns from her label are sent out to chain music-playing pies to park benches around the world.