How is “mix in” used?

In I Love You, Man (2009), one line is: “And something with sour mix in it for her.”

Which movie is “mix in” from?

The clip at the top of this page is from I Love You, Man (2009).

Phrasal verb

to add one substance to others, especially in cooking

Se oye en 172 películas

mix sth in (with sth)
to add one substance to others, especially in cooking
Mix the remaining cream in with the sauce.

Definiciones del Oxford Advanced Learner's Dictionary, 9.ª edición

And something with sour mix in it for her.

En 8 películas · n.º 1