YOU SAID:

munch on the party snacks with us

INTO JAPANESE

私たちと一緒にパーティースナックをむしゃむしゃ食べる

BACK INTO ENGLISH

I'm going to have a party snack with us.

INTO JAPANESE

私は私たちと一緒にパーティースナックを食べるつもりです。

BACK INTO ENGLISH

I'm going to have a party snack with us.