melt in (your) mouth
to be soft and creamy.
The outside of the cake is just a little crisp and the center just melts in your mouth.
英语词组固定搭配大全包含18674条英汉双解词组，基本涵盖了全部常用英文词组、短语的翻译及用法，是英语学习的有利工具。