Slow Cooker Bangers & Onions with Just 4 Ingredients

This slow cooker 4-ingredient Bangers and Onions is the kind of simple, hearty dish my Irish grandfather would have made in March—just a few ingredients, slow cooking, and big, satisfying flavor. Sweet onions form a soft bed for classic Irish sausages, slowly turning into a rich, savory gravy. With minimal effort, you get sausages so tender they practically fall apart under your fork, coated in a glossy sauce that tastes like you spent hours fussing.

It’s pure comfort food—perfect for St. Patrick’s Day but easy enough for any weeknight dinner.

Serve over buttery mashed potatoes so the gravy can soak in, and pair with steamed cabbage or sautéed greens for a balanced plate. Crusty bread is a must for mopping up the last drops. For drinks, a malty Irish red ale or stout is ideal, though a dry cider or crisp salad works just as well.

Slow Cooker Bangers & Onions

Ingredients

Directions

1. Prep the onions
   Peel and thinly slice the onions.
2. Brown the sausages (optional)
   Sear the sausages in a skillet for 2–3 minutes per side for extra flavor.
3. Layer the onions
   Scatter the sliced onions evenly in the bottom of the slow cooker.
4. Add the sausages
   Nestle the sausages on top of the onions.
5. Make the gravy
   Combine the beef stock and Worcestershire sauce, then pour over the sausages and onions.
6. Slow cook
   Cover and cook on LOW for 6–8 hours or HIGH for 3–4 hours, until the sausages are tender and the onions have softened into a dark, flavorful gravy.
7. Optional thickening
   Remove the lid for the last 30 minutes, or mash a few onions into the liquid for a richer consistency.
8. Serve
   Taste and adjust seasoning if needed. Spoon the sausages and gravy over mashed potatoes or your favorite sides. Garnish with fresh parsley if desired.