Bag-Shortcut Buttermilk Slaw with Pickle Brine
A 10-minute side that earns a spot at every cookout, picnic, and Tuesday-night sandwich — bagged slaw mix, a quick salt-rest, and a buttermilk dressing tuned with sweet pickle brine.
The slaw I make when I want potluck-energy without the potluck commitment. It starts with a bag of pre-cut coleslaw mix because life is short, but two small upgrades — a quick salt-rest and a splash of pickle brine in the dressing — pull it firmly out of “back of the bag” territory.
The twist that makes this one mine: buttermilk and mayo together instead of mayo alone, which gives the dressing a brighter, looser, more Southern feel — closer to what you’d get at a barbecue joint than a deli case. And a spoonful of sweet pickle brine in place of plain sugar, for a tangy-sweet depth (mustard seed, turmeric, a hint of clove from the pickle spice) that flat sugar can’t touch.
Why this works
Pre-salting cabbage is the move that separates a structured slaw from a soggy one. Cabbage is mostly water, and unsalted shredded cabbage continues to leak liquid into the dressing for hours, which is why most slaws are noticeably wet by the time they hit the table. Fifteen minutes with a teaspoon of salt pulls out enough water that the leaves stay crisp under the dressing for a full day. The buttermilk-mayo combo gives you both richness and brightness — straight mayo is one-note. And pickle brine, instead of plain sugar, brings sweetness with acid and aromatic depth, which is why the dressing tastes layered instead of flat.
Make ahead
The dressing keeps 5 days in the fridge in a jar. The slaw mix can be salted, drained, and refrigerated up to 24 hours ahead — store it pressed dry in a paper-towel-lined container. Combine within an hour of serving for the best texture.
Freezer notes
This one isn’t a freezer recipe — frozen-then-thawed cabbage turns to mush. If you’ve got leftover slaw, repurpose it: it’s excellent on a pulled pork sandwich the next day, or piled inside a fish taco, or chopped fine and folded into tuna salad.
Ingredient swaps
- Coleslaw mix → 4 cups thinly sliced green cabbage + 1 cup shredded carrot + 1/2 cup thinly sliced red cabbage: From scratch, if you’ve got the time and a sharp knife.
- Buttermilk → 1/3 cup whole-milk Greek yogurt thinned with 1 tbsp water: Tangier, equally creamy.
- Pickle brine → 1 tbsp honey + 1/2 tsp pickle juice: If you don’t keep pickles on hand.
- Apple cider vinegar → white wine vinegar or rice vinegar: Slightly less robust but works.
- Celery seed → 1/2 tsp caraway seed: Different but excellent — a little more central-European.
Sarah’s kitchen notes
The bag-of-slaw-mix shortcut is one I will not apologize for. Hand-shredding cabbage on a Tuesday is a great way to make sure dinner doesn’t happen, and the bagged stuff is genuinely fine. What is worth the extra step is the salting — it takes 15 minutes during which you can do literally anything else, and it changes the whole texture of the finished dish. Also: keep a jar of bread-and-butter pickles in the door of your fridge and you’ll find a hundred uses for the brine. It goes into deviled eggs, into tartar sauce, into chicken salad, into the dressing on a wedge salad. The pickles themselves are almost a bonus.
Ingredients
Slaw
Buttermilk dressing
Instructions
- Salt the slaw first. Tip the coleslaw mix into a colander set over a bowl or in the sink. Toss with the kosher salt and let it sit for 15 minutes — the salt pulls excess water out of the cabbage so your dressing stays creamy instead of watery. Press gently with your hands to squeeze out any obvious liquid, then transfer to a serving bowl. Don't rinse.
- Whisk the dressing. In a small bowl: mayo, buttermilk, pickle brine, cider vinegar, lemon juice, Dijon, celery seed, and pepper. It should taste tangy-sweet with a little kick — adjust salt at the end since the slaw is already lightly salted.
- Dress slowly. Pour about two-thirds of the dressing over the slaw and toss. Add more to taste — some bags of slaw mix are heavier on dense cabbage and can take all of it; others get coated faster.
- Serve immediately for crunch, or chill 30 minutes for the flavors to settle. Best within 24 hours.
Notes
- Pre-salting is the move that keeps the slaw structured instead of soupy — don't skip the 15-minute rest.
- Keep a jar of bread-and-butter pickles in the fridge door. The brine goes into deviled eggs, tartar sauce, chicken salad, and a wedge salad dressing. The pickles themselves are almost a bonus.
