Tender corned beef simmered with cabbage, potatoes, and carrots is a hearty Irish-American family tradition. Rich in protein, this one-pot meal is a comforting classic especially loved around St. Patrick's Day.
Place the corned beef brisket in a large pot and cover with 8 cups water. Add the spice packet if provided, peppercorns, bay leaves, and salt.
Bring the pot to a gentle boil over medium-high heat, then reduce to low and simmer, covered, for 2 hours. Skim foam as needed.
Quarter the cabbage, halve the potatoes, cut carrots into thick slices, and roughly chop the onion.
Add the potatoes, carrots, and onion to the pot. Continue simmering on low for 30 minutes, ensuring vegetables become tender but not mushy.
Add cabbage wedges to the pot and cook for 30–40 minutes more, adjusting timing for desired tenderness. Remove meat and vegetables, slice brisket across the grain, and serve immediately.