How do I know when the corned beef is tender?
The brisket should be fork-tender after 2.5 to 3 hours of gentle boiling. Pierce the thickest part with a fork—it should slide through with minimal resistance.
Can I use a slow cooker instead of boiling?
Yes. Place the corned beef, pickling spice, onion, garlic, and bay leaves in a slow cooker, cover with water, and cook on low for 6–8 hours. Add cabbage, potatoes, and carrots in the last 45 minutes.
What makes the green mashed potatoes green?
Blend or mash cooked potatoes with fresh parsley, spinach, or green food coloring. Add butter and cream as you would for regular mashed potatoes.
Can I make this ahead?
Yes. Cook the corned beef and vegetables up to 2 days ahead, refrigerate in broth, and reheat gently on the stovetop. Make green mashed potatoes fresh before serving for best color and texture.
What size brisket works best?
A 3-pound corned beef brisket serves 4–6 people comfortably. For larger gatherings, increase to 4–5 pounds and extend cooking time by 30–45 minutes.