Ingredients You'll Need

I always keep a one-pound bag of green split peas in my pantry; they’re inexpensive, protein-rich, and practically cook themselves into silky submission. Look for peas that are uniformly bright green—any mottled, yellowed, or cracked specimens signal age and will take longer to soften. (Yellow split peas work too, but they’ll give you a slightly earthier, more Scandinavian vibe.)

Ham hock versus ham bone versus diced ham? I tested all three. A smoked ham hock (usually $3–4 at the grocery) delivers the deepest, smokiest broth, while a leftover holiday ham bone with a bit of meat clinging to it is the most economical and still wonderfully savory. If all you have is thick-cut deli ham, no worries—brown the cubes first in a dry skillet to intensify flavor, then add them in the final hour so they stay plump.

Aromatics are classic mirepoix—onion, carrot, celery—but I swap in a small parsnip for half the carrot when I want subtle sweetness. Buy firm, unblemished vegetables and dice them small; the slow cooker won’t break them down the way a stockpot does.

Fresh thyme is worth the splurge; the woody stems pop right out after cooking, leaving delicate leaves behind. If you only have dried, use half the amount and add it with the broth so the oils rehydrate.

Low-sodium chicken broth keeps the salt in check—especially important if your ham is on the salty side. If you keep homemade stock in the freezer, congratulations, you’re already winning.

Bay leaf and a single clove are my grandmother’s secret. The clove perfumes the soup without announcing itself; remove both before blending.

Why This Recipe Works

No pre-soaking: split peas dissolve into creamy comfort all on their own.
Set-it-and-forget-it: dump everything in before work; come home to lunch for the week.
Smoky depth: a ham hock braises for hours, infusing every spoonful.
Vegetable boost: carrots and celery soften into the background so picky eaters still get vitamins.
Two textures: leave it brothy or blitz half for diner-style silkiness.
Freezer hero: portion into mason jars and reheat straight from frozen on busy Mondays.
Budget friendly: feeds eight for under ten dollars.

How to Make Slow Cooker Split Pea Soup with Ham for a Classic Lunch

Prep the aromatics

Dice 1 medium yellow onion, 2 carrots, and 2 celery stalks into ¼-inch pieces. Mince 2 garlic cloves. The small dice ensures they’ll practically melt after 8 hours.

Rinse the split peas

Place 1 pound (about 2 ¼ cups) green split peas in a fine mesh strainer. Rinse under cold water until the water runs clear; pick out any dark shriveled pieces or small stones.

Load the slow cooker

Add the rinsed peas, chopped vegetables, 1 ham hock (or ham bone), 6 cups low-sodium chicken broth, 2 sprigs fresh thyme, 1 bay leaf, and 1 whole clove. Give everything a gentle stir; the liquid should just cover the solids—add up to 1 cup water if needed.

Cook low and slow

Cover and cook on LOW for 8–9 hours or HIGH for 4–5 hours. Resist peeking; the steam trapped under the lid is what breaks down the peas.

Shred the ham

Carefully lift out the ham hock onto a plate. When cool enough to handle, pull off the meat with two forks; discard skin, fat, and bone. Chop the meat into bite-size pieces and return it to the slow cooker.

Adjust texture

For a classic, slightly chunky soup, simply stir. For diner-smooth, ladle 3 cups into a blender, puree until velvety, then return to the pot. An immersion blender works too—just pulse 4–5 times.

Season to taste

Stir in ½ teaspoon freshly ground black pepper. Taste before adding salt; ham varies widely in salinity. If the soup tastes flat, a splash of lemon juice or white wine vinegar brightens everything.

Serve or pack for lunch

Ladle into warm bowls, garnish with a thyme sprig or a swirl of plain yogurt, and serve with buttered rye toast. Cool leftovers completely before refrigerating or freezing.

Expert Tips

Overnight trick

Prep everything the night before; keep the rinsed peas and chopped veg in a zip-top bag with a paper towel to absorb moisture. In the morning, dump into the slow cooker, add broth and ham hock, hit START.

Thin versus thick

The soup will thicken as it stands. Keep a kettle of hot water nearby; thin with ½ cup increments when reheating.

Quick-chill safety

Divide hot soup into shallow containers and place in an ice-water bath; stir every 5 minutes until lukewarm, then refrigerate. You’ll drop through the danger zone fast and avoid cloudy leftovers.

Smoked turkey swap

For a lighter, still-smoky version, substitute a smoked turkey wing. The collagen gives body without as much fat.

Blender safety

Never fill a blender more than halfway with hot soup; remove the center cap and cover with a folded towel to let steam escape.

Pepper power

Crack peppercorns right before serving; volatile oils dissipate when cooked for hours.

Variations to Try

Vegetarian: omit ham, use vegetable broth, and stir in 2 cups diced smoked tofu in the last 30 minutes. Add 1 teaspoon smoked paprika for depth.
Curried: add 1 tablespoon yellow curry powder and ½ teaspoon turmeric with the broth. Finish with coconut milk and cilantro.
Herby spring version: swap thyme for dill, fold in frozen peas and fresh spinach during the last 10 minutes for color.
Spicy: add 1 diced jalapeño and ½ teaspoon cayenne. Serve with pepper-jack grilled cheese.
Italian-inspired: use a parmesan rind instead of ham hock, finish with basil pesto and grated Parm.

Storage Tips

Refrigerator: Transfer cooled soup to airtight containers and refrigerate up to 4 days. The peas will continue to absorb liquid, so keep extra broth or water on hand when reheating.

Freezer: Ladle into pint-size freezer bags, squeeze out excess air, and lay flat on a sheet pan. Once solid, stack vertically like books. Use within 3 months for best flavor, though safe indefinitely. Thaw overnight in the fridge or microwave on 50 % power, stirring every 2 minutes.

Make-ahead lunch jars: Portion 1½ cups soup into 16-oz mason jars, leaving 1 inch headspace. Freeze without lids for 2 hours, then screw on lids to prevent expansion cracks. Grab one on your way out the door; it’ll be thawed by noon and can be reheated in the microwave (remove metal lid first).

Frequently Asked Questions

Split peas continue to cook even after the slow cooker turns off. If left on warm too long, they break into starch granules that feel gritty. Next time, switch to “keep warm” only after shredding the ham, and stir occasionally.

Red lentils cook faster and will dissolve into a puree within 3 hours on low. If you like that texture, go ahead, but the soup won’t have the classic split-pea appearance.

Nope! Traditional split-pea soup is brothy with tender peas. Blending just half gives you the creamy body many diners serve. Leave it untouched if you prefer rustic texture.

Peel a large potato, cube it, and simmer 20 minutes; the starch will absorb some salt. Remove potato before serving. Alternatively, dilute with unsalted broth or water.

Yes, as long as your slow cooker is 7-quart or larger. Keep the same cook time; just stir once halfway to prevent scorching on the bottom.

Naturally! Just double-check that your broth is certified gluten-free if serving sensitive guests.