YOU SAID:

I can't believe this butter stuff isn't actually butter even though it tastes, smells, and feels like butter.

INTO JAPANESE

私はこのバターが実際にはバターではないとは信じられません。

BACK INTO ENGLISH

I can not believe that this butter is actually not butter.

INTO JAPANESE

私はこのバターが実際にはバターではないとは信じられません。

BACK INTO ENGLISH

I can not believe that this butter is actually not butter.