Oven-Baked Corned Beef Brisket with Spice Rub
This tender, flavorful corned beef brisket is slow-baked in the oven using a two-stage technique that creates incredibly juicy results. The meat starts uncovered to develop a seasoned crust, then wraps in foil to steam in its own juices. Perfect for St. Patrick's Day or any time you want an effortless yet impressive main dish that feeds a crowd.
Ingredients
- 2 lbs corned beef brisket, retaining fat layer
- 4 lbs corned beef brisket, retaining fat layer(optional)
- 1 packet spice flavor packet, included with corned beef
- ½ tablespoon onion powder
- 1 teaspoon thyme leaves, dried
- 1 teaspoon paprika
- 1 teaspoon garlic powder
- heavy aluminum foil
Instructions
- 1
Preheat oven to 275 degrees
- 2
Combine spice packet with onion powder, thyme, paprika, and garlic powder in spice grinder or mortar and pestle
- 3
Grind spice mixture to medium or medium-fine texture and set aside
- 4
Rinse corned beef brisket well with cold water and pat dry
- 5
Tear off large sheet of heavy aluminum foil in 9x13 baking dish
- 6
Place corned beef on foil fat side up
- 7
Sprinkle seasoning mix over brisket and pat into meat
- 8
Bring foil up around brisket but do not seal
- 9
Bake unwrapped for 2 hours
- 10
Wrap brisket tightly in foil, tenting and sealing completely
- 11
Continue baking for additional 2 hours or until internal temperature reaches 185 degrees
- 12
Check for fork tenderness and continue baking if needed
- 13
Allow meat to rest before slicing
- 14
Cut against the grain using electric knife for thin slices
Tips
If your corned beef lacks a spice packet, add 2 tablespoons peppercorns and 0.5 tablespoon coriander seeds to the seasoning mix.
Check for moisture inside the foil during the wrapped cooking phase and re-wrap if needed to maintain steam.
Use an electric knife to achieve clean, thin slices when serving.
Good to Know
Refrigerate leftovers up to 4 days. Reheat gently in low oven or microwave.
Can be cooked 1-2 days ahead and reheated. Slice just before serving.
Serve with horseradish, rye bread, and traditional Irish sides like colcannon potatoes.
Common Mistakes
Don't trim the fat layer to avoid dry meat
Don't skip the resting period to prevent juices from running out when sliced
Substitutions
if packet not included
FAQ
Can I reduce the saltiness before cooking?
Yes, you can soak the brisket in cold water for several hours or overnight, changing the water periodically to draw out excess salt.
What if my brisket isn't tender after the suggested time?
Continue cooking in 30-minute increments until fork tender. Thickness and starting temperature affect cooking time significantly.
How long will this keep in the refrigerator?
Properly stored cooked corned beef will keep 3-4 days refrigerated. Slice only what you need to maintain moisture.