"Marshmallow World" is the 7th episode in Angry Birds Food Bash! It was released on March 31, 2017, and contains 30 levels.
The pigs and birds were fighting each other one day over a marshmallow, and the god of Angry Birds decided to make things fair, so he transported them into Marshmallow World, and they can have all the Marshmallows they want. The birds want the more sugary marshmallows and the pigs want it too, so another fight begins. They all get sticky in the marshmallows.