Idiomatic To prepare something from ingredients that are mixed.
She mixed up a batch of her own potting soil.
The picture of their life that follows suggests in a few words a country kitchen—the sizzling of fish over the charcoal fire, fanned by the bellows to a hot flame, the mixing up of a Thasian sauce for the fish, the kneading of dough.1956, Katherine Lever, “Aristophanes, Comic Poet”, in The Art of Greek Comedy, London: Methuen & Co. […], →OCLC, page 140:
I always mix up Vermont and New Hampshire on a map.
I always mix up Jack with Jake.
5
Often, With be or get, With with To become involved with, especially socially or romantically.
Usually passive voice
He got mixed up with a bad crowd.
Then he got mixed up with an older woman.
3 more examples
Now, he's mixed up with some half-baked religion.
Hey! What're you gonna do? Nice college boy, huh? Didn't want to get mixed up in the family business. Now you want to gun down a police captain. Why? 'Cause he slapped you in the face a little bit?1972 March 14, Mario Puzo, Francis Ford Coppola, The Godfather, spoken by Sonny Corleone (James Caan), Paramount Pictures:
KEELHAUL KEY!? That's that cursed island! Don't get mixed up with that place, for your own sake.2004, Intelligent Systems, translated by Nintendo of America, Paper Mario: The Thousand-Year Door, Nintendo, GameCube, level/area: Rogueport:
Everton were, perhaps understandably, deflated at the setback and it was no surprise when Suarez added Liverpool's second after 82 minutes. Distin and Baines were involved in a mix-up as the Uruguayan advanced into the area, and he was not about to pass up the gift to shoot low past Howard.2011 October 1, Phil McNulty, “Everton 0 - 2 Liverpool”, in BBC Sport, archived from the original on 12 Jun 2012: