Preheat your oven to 350 degrees F (175 degrees C). Grab your largest oven-proof dish—something with high sides is ideal, like a trusty Pyrex. Line the dish with a generous piece of heavy-duty aluminum foil. You’ll want enough foil to wrap up your corned beef snugly when the time comes.

Remove the corned beef from its package, making sure to set aside the seasoning packet. Toss any unnecessary packaging aside. Rinse the meat under cold water to remove excess brine, which helps enhance the flavor. Pat it dry gently with some paper towels.

Place your corned beef on the middle of the aluminum foil so the fat cap is facing upward. This allows the fat to baste the meat as it cooks, leading to juicy slices. This is where the magic begins!

Next, grab that 1/4 cup of Dijon mustard. Go ahead and slather it generously all over your corned beef—top, bottom, and sides. This tangy base not only adds flavor but also helps the seasoning stick!

Open the seasoning packet and sprinkle it over the mustard-covered meat. Focus mainly on the top, as this is where the seasoning will really shine. It might feel like a lot, but trust me! It’s essential to the final taste.

With the foil at your disposal, carefully wrap the corned beef tightly. We want to keep all the steam and flavors locked in. Fold the edges securely so no steam escapes during cooking.

Place the foil-wrapped corned beef in the preheated oven. Now comes the waiting game! Bake for approximately 1 hour per pound. So for this 4 lb beauty, you’re looking at a solid 4 hours of oven time. You might want to set a timer, so no one forgets about this gem while stirring up a snack!

Once your timer goes off, carefully remove the corned beef from the oven and open the foil (watch for steam—yikes!). Here, you can choose to broil your corned beef for an additional 5 minutes on high heat to crisp the top. It’s that final touch that can elevate the dish—so good!

After broiling (or not), let the corned beef rest for about 10 minutes. This allows the juices to redistribute, giving you a more tender product. Slice it against the grain for the best texture, and it’s ready to serve with your favorite sides!