Slow Cooker Pork Ribs
Published August 9, 2020 • Updated March 9, 2026
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Three ingredients, zero babysitting. These pork ribs slow cook for 6 hours until the meat pulls clean off the bone. Carnivore and keto friendly.
I make these when I want dinner handled without hovering over anything. Three ingredients go into the crock pot in the morning, and by evening, the meat is falling off the bone without any work in between.
The method is simple. Season a rack of ribs with salt and pepper, pour half a cup of apple cider vinegar into the bottom of the crock pot, and stand the ribs upright along the liner. The vinegar creates steam that keeps the meat moist during the long cook, and the acidity helps break down the connective tissue faster. You will not taste vinegar in the finished ribs. It cooks off completely.
Standing the ribs upright (meaty side pressed against the liner wall) is the detail most recipes skip. That direct contact with the hot ceramic gives you a slight caramelization on the outside. You will not get a bark like a smoker, but the exterior develops more color and texture than ribs sitting flat in liquid.
This is naturally zero carb. No sauce, no sugar rub, no hidden ingredients. If you follow a keto dinner rotation or strict elimination protocol, these fit without modifications. I take a similar approach with my braised short ribs and smoked beef ribs, but this version requires the least attention of all three.
I have tested both baby back ribs and St. Louis style spare ribs here. Baby backs are leaner and cook faster (closer to 5 hours on low). St. Louis spare ribs have more fat marbling and benefit from the full 6 hours. Either cut works. For a shredded texture, go with spare ribs at 7 to 8 hours. The meat falls apart with a fork, similar to my keto pulled pork.
One thing I picked up from a reader and now do every time: press a dry rub into the meat the night before. The crock pot steam washes surface seasoning off before it can penetrate, so an overnight rub makes a noticeable difference. Garlic powder, paprika, and onion powder work well without adding carbs. A few drops of liquid smoke in the rub gives you smoky depth without a smoker. I keep the base recipe at salt and pepper for a strict approach, but the rub option is worth trying.
If you like the set-and-forget method here, I use the same approach for Asian pork tenderloin and steak and peppers in the crock pot.
How to make slow cooker pork ribs
Start by removing the membrane from the back of the ribs if you want a more tender result. I slide a butter knife under the membrane near one end, grip it with a paper towel, and pull it off in one motion. This step is optional, but removing it lets the seasoning reach both sides and prevents that rubbery texture after a long cook.
Season all sides generously with salt and pepper. Pour half a cup of apple cider vinegar into the bottom of the crock pot liner.
Stand the pork ribs upright with the meaty portion pressed against the liner wall. This positioning gives the meat more direct heat contact, which creates better color and texture on the surface. I have tried them lying flat and standing, and standing wins every time. Cook on low for 6 hours.
The ribs are done when the meat pulls away from the bone with no resistance. If you want a finishing glaze, brush with your favorite low carb sauce and broil for 2 to 3 minutes. Watch closely since the glaze can burn fast under a broiler.
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Ingredients
1 rack pork ribs -
salt, pepper, garlic salt for seasoning
-
1/2 cup apple cider vinegar
Step by Step Instructions
Step by Step Instructions
Remove the membrane
Remove the membrane of pork ribs if needed or desired. To do so, take a butter knife and slide it under the membrane next to the ribs to form a pocket. Then slide two or three fingers under the membrane to create more space. Using a paper towel for grip, hold onto the membrane with the paper towel and pull off the membrane until it is completely removed. (See below for further instructions.)
Season the ribs
Generously season all sides of the pork ribs with salt and pepper (if using).
Add apple cider vinegar
Pour apple cider vinegar to the liner of the crock pot.
Add ribs
Add pork ribs to the liner of the slow cooker. Let the ribs sit upright on its edge with the meaty portion up against the liner. This will help give the ribs a nice golden crispy exterior.
Slow cook the ribs
Cook on low setting for about 6 hours.
Nutrition disclaimer
The nutrition information provided is an estimate and is for informational purposes only. I am a Doctor of Pharmacy (Pharm.D.); however, this content is not intended to be a substitute for professional medical advice, diagnosis, or treatment. Always consult your physician or other qualified health provider before making any lifestyle changes or beginning a new nutrition program.
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Get My Macros + Recipes →Frequently Asked Questions
Can I freeze these ribs before or after cooking?
I freeze these both ways. For raw, season the ribs, seal them in a freezer bag with the air pressed out, and freeze for up to 3 months. When you are ready, thaw overnight in the fridge and cook as directed. For cooked leftovers, I pull the meat off the bone, portion it into containers, and freeze. Reheat in a 300 degree oven wrapped in foil with a splash of water for 15 to 20 minutes. I have found raw-frozen ribs taste slightly better than reheating cooked ones, so I prefer to freeze before cooking when I am meal prepping.
Can I make these in an Instant Pot or pressure cooker?
I have done these in the Instant Pot and they come out tender in about 25 minutes at high pressure with a 10 minute natural release. The trade-off is texture. Pressure cooking does not give you that slow breakdown of collagen that a 6 hour cook produces, so the meat is tender but not quite fall-off-the-bone the same way. I use the same three ingredients and add half a cup of water along with the vinegar since the shorter cook does not evaporate the liquid fully. If you like the pressure cooker approach, my Instant Pot shredded chicken uses a similar method.
My ribs turned out tough. What went wrong?
Two common causes in my experience. First, the cook time was too short. Baby backs need at least 5 hours on low and spare ribs need 6. If you cooked on high, the exterior can firm up before the interior collagen has time to fully convert. Second, the ribs dried out because there was not enough liquid in the bottom. Make sure you have a full half cup of vinegar creating steam. I have also seen tough results when the lid comes off repeatedly during the cook. Every time you lift it, you lose heat and moisture that takes 15 to 20 minutes to recover.
Does rib positioning in the slow cooker matter?
Yes, and I tested this. Standing the ribs upright with the meaty side against the liner wall gives you better color and a slight caramelization from the direct ceramic contact. I tried laying them flat in one batch and standing them in another, and the standing ribs had noticeably better texture on the exterior. If your rack is too tall, cut it in half and stand both halves upright. Packing them tight is fine. I have done two racks pressed against each other and they cooked evenly.
What can I use instead of apple cider vinegar?
I have used white vinegar as a direct swap at the same amount and the result is identical. A mix of 2 tablespoons lemon juice plus enough water to reach half a cup also works. The vinegar cooks off completely during the 6 hours, so the flavor difference between types is minimal. I would not skip the acid entirely though. It breaks down connective tissue and creates the steam that keeps the surface of the meat from drying out.
How long should I cook the ribs?
I cook baby backs for about 5 hours on low and St. Louis spare ribs for the full 6. You can cook on high for 3 to 4 hours, but I prefer low because the slower breakdown of collagen produces a more tender result. My ribs are done when the meat pulls away from the bone with no resistance and I can see about a quarter inch of exposed bone at the ends. If you want a shredded texture, go 7 to 8 hours with spare ribs.
Do I need to remove the membrane from the ribs?
I remove it every time, but it is optional. The membrane is a thin, translucent layer on the bone side of the rack. If you leave it on, it turns rubbery during the long cook and blocks seasoning from reaching the underside of the meat. My method: slide a butter knife under the membrane near one end, grip it with a paper towel for traction, and pull it off in one motion. Takes less than a minute once you have done it a few times. Most butchers will do it for you if you ask.
How should I store leftovers?
I store leftover ribs in an airtight container in the fridge for up to 4 days. They freeze well for up to 3 months. To reheat, I wrap them in foil with a splash of water and warm them in a 300 degree oven for 15 to 20 minutes. The microwave works but the oven holds the texture better. I have also pulled the meat off the bone and used it in scrambled eggs and salads throughout the week.
These slow cooker pork ribs are a filling dinner when I don’t have time to cook at night. I just place a rack of ribs in the crock pot and cook on low for several hours.
The ribs turn out tender and juicy with just two seasonings: salt and apple cider vinegar.
To remove the membrane from a rack of pork ribs,
Made a full rack Sunday to have lunches for the week, and I wasn't sure how ribs would hold up after a few days in the fridge. They reheated better than expected - meat stayed tender and didn't dry out, which I can't say for the chicken I usually batch cook. The apple cider vinegar must be doing something, because the flavor actually deepened by day three. With 42g of protein per serving, I wasn't reaching for anything else by 2pm. It's in the weekly rotation now.
Day three is legitimately better than day one. The ACV pulls the flavor all the way through once it has had time to rest.
If you have 5 extra minutes, broil them before plating. Outside goes from pale and soft to slightly charred, holds smoke like a proper rack. Baby backs at 5.5 hours for me. That last step made it.
That 5 minutes under the broiler is worth it. The slow cooker does the tenderness but it can't give you that char - you have to finish it yourself. 5.5 for baby backs tracks with mine too.
First time ever making ribs at home and I kept hovering around the slow cooker all afternoon because the smell was unreal. Three ingredients and they just fell off the bone, I don't think I'll ever overthink ribs again.
The smell takes over the whole house. Once you know ribs just need time, there's nothing to fuss with.
Put these on before church and came home to the whole house smelling like a barbecue joint. My son, who has been on a carnivore kick for the past three months, walked in and immediately asked if I used a smoker. No smoker. Just the crock pot, the apple cider vinegar, and six hours. The meat was pulling off the bone before I even tried to plate it, which I wasn't expecting from such a short ingredient list. My one note: season more aggressively than you think, since there's nothing else carrying the flavor once the vinegar cooks off. I'll keep making this, just with a heavier hand on the garlic salt next time.
Ha, carnivore-approved without a smoker. You're right on the seasoning too - three ingredients means nothing to fall back on once the ACV cooks off. I go heavier than looks right every time.
Made these last weekend and they came out really tender, but mine kept falling over and were basically flat the whole time. Does it actually matter if they stay upright, or is that just so they fit the rack?
It matters. I tested both and standing them up with the meaty side against the liner wall gives you better color and a little caramelization where the meat contacts the ceramic. Flat still works, tenderness is the same, but you lose that.
Didn't think ACV and basic seasoning would cut it. Six hours later the meat was pulling clean off the bone and the house smelled incredible. Four stars only because I want to try finishing under the broiler next time.
Broil at high for 3-4 minutes after the slow cooker. That char on the edges is the best part. Watch them, they turn fast.
first time making ribs and after 6 hours the meat was just... falling off the bone? did I get lucky or is that how it's supposed to go
Not luck. Six hours on low breaks down the collagen completely and the bones just slide. That's exactly what you're going for.
Brought these to a cookout last weekend and the rack was gone before I even sat down, which considering it's just ribs, salt, and apple cider vinegar, I genuinely wasn't expecting.
Three ingredients and the rack goes first. Every single time.
My husband is not someone who stands around in the kitchen, but the smell of these cooking for 6 hours brought him in twice to check on them. The meat pulled clean off the bone just like Annie said it would.
That smell around the 4-hour mark is the worst (or best). Nobody in my house ignores it either.
I've tried a few slow cooker rib recipes and they either called for a whole list of spices or some pre-made sauce I didn't have. This one with just salt, pepper, and apple cider vinegar produced ribs that actually pulled clean off the bone. Didn't think it would work until I lifted the lid at hour six. Nothing else I've made comes close for how little effort it takes.
Hour six gets everyone. Salt, pepper, ACV sounds like you forgot to add stuff, and then the bones just slide out.
I've tried slow cooker ribs probably six different ways over the years, including a few with fancy rubs and jarred sauce layered in. This one beat all of them. The apple cider vinegar keeps the meat juicy without making it tangy at all, which I wasn't expecting. Pulled clean off the bone. Didn't have to touch the slow cooker once after the lid went on.
That no-tang thing surprises people every time. Six hours and the sharpness just cooks off. Really there to keep the meat from drying out, not add flavor.
I've oven-roasted ribs a hundred times but slow cooker always made me nervous (kept picturing something steamed and gummy), so I put this off for months. Finally just did it on a quiet Sunday. Threw everything in, set it to low, forgot about it, came back two hours later and the whole kitchen smelled like I'd been cooking with way more than three seasonings and a splash of ACV. The texture surprised me. Expected mush, but the meat held its shape until I actually pulled at it, then it just gave, clean off the bone. I almost skipped the apple cider vinegar (with so few ingredients it seemed weird) and I'm glad I didn't. It's doing more than it looks like. The edges had this sticky rendered-fat thing I kept picking at before I even plated anything. My question: does it matter if the ribs are packed tight versus kind of leaning? Mine were propped sideways and it worked, but curious if positioning changes how evenly they cook on a second try.
Positioning matters. I tested it both ways. Upright, meaty side pressed against the liner wall, gets you better color from the ceramic contact. Yours worked because 6 hours is forgiving, but that wall contact is what produces those edges you were picking at.
First time making ribs and I almost gave up and ordered pizza, but six hours later the house smelled incredible and the meat was just falling off the bone. No idea what the apple cider vinegar is actually doing but these were so tender. Making these every cold Sunday now.
ACV breaks down the connective tissue. That's literally why ribs need it. Cold Sundays, good call.
Swapped the apple cider vinegar for chicken broth with a little hot sauce, and the liquid at the bottom after 6 hours was too good to toss. Spooned it over everything when I plated.
Yeah broth gives you an actual braising liquid. The ACV cooks down too sharp to save. Hot sauce in the base was a good call.
Made these for Sunday dinner. The meat pulled right off the bone after 6 hours and the apple cider vinegar gave it a nice tang. I removed the membrane first like the recipe said. The ribs didn't have much seasoning flavor though, just salt and pepper. Next time I'll add garlic powder or a dry rub before they go in. Still really good and my husband had seconds, but they need more flavor on the actual meat. The texture was perfect though, super tender.
Dry rub is the move. The garlic salt in the recipe seasons the surface but slow cooker steam washes a lot of it off before it can really penetrate. Pressing a rub into the meat the night before makes a noticeable difference.