Slow Cooker French Philly Sandwich

Slow Cooker Roast Beef Sandwich by Carchellany! Easy recipe with loads of flavor!

Whenever I see roast beef on sale, my mind immediately goes to your standard crockpot roast beef and mashed potatoes dinner. It’s simple, fast, and tastes delicious. Now, while I love that meal, it can start to feel a little tired and ordinary after a while. So, I began to think, what else could I make with roast beef?

My first thought was of sandwiches (they are my favorite food!) I love going to a restaurant and getting a French dip sandwich but I often ask to add peppers and onions on it for a little more flavor. I also love Philly cheesesteaks but I always ask if they have an Au Jus I can add on the side to dip my sandwich in! These thoughts all came to mind as I tried to create a more exciting dish. Then it came to me, this is one of the many benefits of cooking in your own kitchen, there are no rules, you make your own! So, my conclusion, why not both? Thus, the French Philly was born!Slow Cooker Roast Beef Sandwich by Carchellany! Easy recipe with loads of flavor!This sandwich is packed with flavor, loaded with meat and toppings, and the Au Jus on the side for dipping highlights the whole dish perfectly! Whenever my husband sees this meal on the table when he comes home, he does a little happy dance, and goes on a monologue to the kids about how they don’t know how lucky they are to have such an amazing cook for a mother! What he doesn’t know, and I’ll never tell, is how simple this meal is! It basically makes itself and then you just throw it all together at the end! Super easy and you look like a rock star!

This is total pub food, so I always like to serve it with kettle chips and a pickle spear! Feel free to comment below with any questions or comments you might have! Enjoy!!

Slow Cooker Roast Beef Sandwich by Carchellany! Easy recipe with loads of flavor!French Philly Sandwich: (Serves 2-4)

  • 2lb Roast Beef
  • 1 box Lipton’s beefy onion soup and dip mix
  • 1 yellow onion
  • 1 green pepper
  • Pepper jack cheese
  • Hoagie rolls


  1. Set your crockpot to low.
  2. Take the peel off your onion and slice it into rings. Then place your whole roast in the crockpot and set the onion rings on top of the roast and all around it.
  3. Next, take 1 of the beefy onion packets and sprinkle it all over and around the roast; it’s fine if it mostly falls off, this is your seasoning. Add about a tsp. of salt and pepper to the pot as well.
  4. Pour a ½ cup of water into your crockpot and cover. Your roast will be ready in about 5 hours. (The longer it’s in, the tenderer it will be.)
  5. When you are ready to eat, slice your green pepper. Then take the other packet of beefy onion seasoning, add it to a saucepan, and mix in 2 cups of water. Bring to a boil, then reduce heat to a low simmer until ready to serve.
  6. Place the green peppers on your hoagies. Cover the green pepper with the pepper jack cheese, as much as each person wants on his or her sandwich.
  7. Then pull your roast out of the crockpot and slice it into long strips. Place the strips on the hoagie roll, then fish out your cooked onions from the crockpot as well and place them on the beef.
  8. Put the hoagies on a baking sheet and place them under the broiler until the cheese has melted; keep a close eye on them so you don’t burn your rolls!
  9. Remove the hoagies from the oven and fold shut so the cheese holds the whole thing in place. Serve while hot with the Au Jus on the side.
  10. Don’t forget to add your chips and pickle too! Enjoy!

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