Name: Instant Pot Beef Po Boy Sandwiches Recipe
Prep time: 10 min
Cook time: 80 min
Total time: 100 min
Ingredients: 3 pounds flank steak; 2 teaspoon sea salt; 1 teaspoon ground black pepper; 2 teaspoon garlic powder; 1 teaspoon onion powder; 1½ Tablespoons olive oil; 1 large onion (cubed); 2 sprigs fresh thyme; 2 sprigs fresh rosemary; 1 packet brown gravy mix; 1½ cups beef broth; 2 Tablespoons Worcestershire sauce; 4 Tablespoons butter (cut into slices); 6 Large French Rolls; 6 Tablespoons mayonnaise; 6 Tablespoons mustard; 2 large tomatoes (sliced); 1½ cups shredded cabbage; sliced pickles (to taste)

This post may contain affiliate links. Read our disclosure policy.

Get ready to taste some of the best roast beef po’ boy sandwiches you can have with this Instant Pot Beef Po Boy Sandwiches easy recipe. Don’t like the longer list of simple pantry ingredients scare you.

Instant Pot Beef Po Boy Sandwiches with toppings

This New Orleans delicacy is one you won’t want to miss, especially when you can cook it the best way in less time, in the Instant Pot.

Even your kids will fall in love with this recipe and tell you your kitchen has transformed into a mother’s restaurant because it tastes just like if you were to grab it from your favorite local place.

Now get your hoagie rolls (I’ve learned that’s what they call sub rolls at other places) and fill them up with the best roast beef po-boy shredded beef and all the best toppings.

More comfort food to make in the Instant Pot:

Ingredients used to make Instant Pot Beef Po Boy Sandwiches:

Ingredients needed to make Instant Pot Beef Po Boy Sandwiches

Flank steak (you can also use a chuck roast, beef roast, or rump roast if you need)
Sea salt
Ground black pepper
Garlic powder
Onion powder
Olive oil
Large onion, cubed
Sprigs fresh thyme
Sprigs fresh rosemary
Brown gravy mix
Beef broth
Worcestershire sauce
Butter, cut into slices
Large French bread rolls
Mayonnaise
Mustard
Large tomatoes, sliced
Shredded cabbage
Sliced pickles, to taste

How to make Instant Pot Beef Po Boy Sandwiches:

Season the steak with salt, pepper, garlic powder, and onion powder.

Sear the beef. Heat the olive oil in the bottom of a large heavy-bottomed skillet over medium-high heat. Add the seasoned steak to the bottom of the pot and sear on one side for a cooking time of 2 minutes. Flip and sear on the other side for 2 minutes.

Adding seared steak and other ingredients to Instant Pot

Fill the Instant Pot. To the bowl of an instant pot, add the onion, thyme, and rosemary followed by the seared steak. Whisk together the brown gravy mix, beef broth, and Worcestershire sauce. Pour it over the beef. Arrange the slices of butter over the beef.
Cook. Seal the instant pot and cook on high pressure for 1 hour and 10 minutes. Allow the pressure to release naturally and it will become fork tender.
Shred the beef. Using tongs, transfer the beef to a cutting board. Shred the tender roast beef with two forks into thin shreds and return it to the warm pressure cooker while you prepare the rolls.

Prepare the French rolls. Preheat the oven to 350 degrees F. Wrap the French rolls in aluminum foil and heat in the oven on a baking sheet for 10 minutes for a perfectly toasted bun.

Ingredients to assemble Instant Pot Beef Po Boy Sandwiches

Assemble the sandwiches. Slather 1 tablespoon of mayonnaise on one side of each roll and 1 tablespoon of mustard on the other. Using a slotted spoon, scoop the beef into the rolls (try to divide it evenly between the rolls). Discard the cooking liquid. Top the beef with tomato slices, shredded cabbage, and pickles.

Close up of Instant Pot Beef Po Boy Sandwiches with toppings

How to store these roast beef sandwiches:

If you have any leftover meat from this Italian beef sandwiches recipe, then all you need to do is place it in an airtight container and store it in the fridge for up to 4-5 days or in the freezer for up to 3 months.

Then just reheat it the next day in the microwave for 1-2 minutes until it is warm enough for you and you are ready to go!

Easy sandwich recipes for home cooks:

Other delicious recipes for the Instant Pot:

Love cooking as much as we do? Join our FREE private Facebook Group: Six Sisters’ Dinner Club!

Instant Pot Beef Po Boy Sandwich in basket

About The Author:

Steph Loaiza

Steph is recipe developer and bestselling cookbook author. Her advanced degrees in communication shape how she breaks down cooking techniques into simple, reliable steps for millions of home cooks around the world. Her work has been featured by Costco Connection, Women's Health, Taste of Home, and more.