go down a treat

To cause great pleasure, enjoyment, or happiness. My daughter's singing went down a treat with the family members gathered at our house for Christmas. That ice cream sundae sure went down a treat. It was the perfect end to dinner. Oh, your gift went down a treat with the kids—they've been playing with it nonstop!

go down a ˈtreat

(British English, informal) be very successful or enjoyable: ‘Did the children like the story?’ ‘Yes, it went down a treat.’ ♢ Mm! ice cream. That’ll go down a treat.