melt in the mouth

/M EH1 L T IH0 N DH AH0 M AW0 TH/
verb
  1. 1

    (of food) To be deliciously soft and creamy, create a melting sensation when eaten, and therefore need little chewing.

adjective
  1. 1

    (of food) Deliciously soft and creamy, creating a melting sensation when eaten, and therefore needing little chewing.

Source: https://en.wiktionary.org/wiki/melt%20in%20the%20mouth