Ingredients and Substitutions

Collard greens: The greens will shrink while cooking, so I recommend using at least 2 bunches or about 2 pounds.

Onion: Yellow or sweet onions work best, but you could substitute red onion if needed.

Garlic: Don’t be shy!

Vegetable broth: You can use chicken broth if that’s all you have and you don’t need your greens to be vegetarian.

Apple cider vinegar: This contributes some tang and helps to tenderize the collard greens. Substitute red wine or white wine vinegar if needed.

Maple syrup: Increase or decrease the amount you use, depending on how sweet you want your slow cooker collard greens to be. You can also use honey or a couple teaspoons of brown sugar instead.

Spices: Salt, ground black pepper, and crushed red pepper flakes. For a smoky flavor similar to what ham or bacon provides in non-vegetarian collard green recipes, add some smoked paprika. If you don’t need your greens to be vegetarian, you can also add ham, bacon, or chicken.

Instructions

For the full recipe card, which includes ingredient quantities and all of the recipe steps, scroll down to the bottom of the page. Here’s a preview of the process.

diced yellow onion on a cutting board with a chef's knife

Dice the onion.

diced onion cooking with olive oil and garlic in a skillet

Cook the onion and garlic in some olive oil in a skillet. If you have a slow cooker with a sauté function, you can cook them right in there.

stems of collard greens being sliced off on a cutting board

Begin preparing the collard greens. After washing and drying them, fold each green in half and slice along the stem. Discard the stems.

collard greens rolled up on a cutting board with a knife

Stack several leaves on top of each other, and roll them up.

collard greens cut into small pieces on a cutting board

Cut the roll of leaves lengthwise to get thin strips. See my tutorial on How to Cut Collard Greens for more information.

broth, maple syrup, vinegar, and spices mixed together in a slow cooker

Combine the ingredients for the broth in the slow cooker: vegetable broth, maple syrup, vinegar, and spices.

collard greens and onions cooking in broth in a slow cooker

Put the sliced collard greens and cooked onion and garlic into the slow cooker with the broth. Stir well.

cooked collard greens in a slow cooker with a serving spoon

Cook on high for at least 3 hours or low for at least 6 hours until the collards have your preferred texture.

Cooking Time

If you’re wondering how long you should cook slow cooker collard greens, there really is no set limit. Using a Crock-Pot is a great way to allow greens to cook “low and slow,” so you really could simmer them overnight on low if you wanted to without making them mushy.

In terms of a minimum cooking time, I found that they should cook for at least 3 hours on high or 6 hours on low to be tender enough to serve. Keep in mind that slow cookers vary in efficiency, so you may need more or less time depending on your slow cooker.

Storage and Reheating

Keep your collards in an airtight container in the refrigerator for up to 5 days. If you want to make them in advance to serve a crowd, you can reheat them right in the slow cooker. Just be sure to give yourself enough time for them to get warm enough. Leftovers can be reheated in the microwave for about 30 seconds.