These leftover prime rib beef dip sandwiches are a quick and tasty dinner and a great way to use leftovers. These French dip sandwiches take just 15 minutes to prepare, perfect for busy weeknights. You can use store-bought hoagie rolls, and if you don’t have any leftover au jus, packaged works just fine. With so many ways to dress them up, they are s meal the whole family will enjoy.
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What are Prime Rib Beef Dip Sandwiches?
Prime rib beef dip sandwiches are a quick and easy meal using leftover prime rib.
We don’t cook prime rib often, but when we do, I want to ensure we use every bit of the leftover beef. Because this recipe calls for reheating ingredients, it is perfect for a quick meal without making a lot of mess.
Leftover prime rib roast makes the best roast beef sandwich, and it is our favorite way to use it.
Pile it high on a toasted hoagie roll and serve it alongside a dish of gravy or au jus for dipping, along with a basket of french fries or some Air Fryer Potato Wedges.
You can make your sandwiches as simple as you like, using just the prime rib leftovers and a hoagie roll or dressing them up by adding melted cheese such as slices of provolone cheese, dijon mustard, horseradish sauce, or sauteed mushrooms.
They work equally well with thin slices, or large cuts of meat.
If you don’t have hoagie rolls, you can use ciabatta buns, crusty French bread, or garlic bread, and in a pinch, any toasted rolls will work just fine. We like to make our own homemade hoagie rolls, but store-bought ones are ok, too.
Ingredients & Substitutions
For a full list of ingredients and measurements, see the printable recipe card at the bottom of this post.
Cooked prime rib – You will want about 12 ounces of cooked beef for two sandwiches, but you can use as much or as little as you like. This recipe also works great with other cuts of leftover beef roast, such as striploin or sirloin.
Hoagie Rolls – We like hoagie rolls for this recipe as the shape works well for dipping into bowls, and they are soft yet dense enough that they don’t fall apart when dipped. If you don’t have hoagie rolls, you can use other rolls, such as ciabatta, or you can even use crusty French bread.
Butter – We add a bit of butter before toasting our rolls. Toasting the rolls helps prevent them from becoming soggy when adding the beef and hold up better when dipped, but you can skip this step if you prefer. If you want to use garlic butter, you can add stir in a bit of garlic powder or use herbed compound butter.
Gravy or Au Jus – Depending on your preference, you can use thicker gravy or thinner au jus for your dip. We generally save our gravy from the night before, and I thin it out just a bit for our dip. If you don’t have any leftovers, and don’t want to make homemade au jus, you can use store-bought instead. You can find this in powdered form, where you add water to make the au jus sauce, or you can purchase it canned. You will want about 1 cup of au jus per sandwich.
Step by Step Instructions
Assembling the sandwiches is quick and easy.
Preheat the oven to broil while you prepare the remaining ingredients.
Slice the hoagie rolls in half, spread with butter, and place face-up on a baking sheet. Set aside.
Pour the gravy into a medium-sized pot and heat it over medium heat. While the gravy is heating, heat a large skillet over medium heat and add the leftover roast.
Let the beef heat for a few minutes, then add about ¼ cup of gravy. Place a lid on the skillet and continue heating.
Place the rolls in the oven to melt the butter and toast the buns. Watch closely, as they won’t take more than a few minutes. You are looking for golden brown.
Remove the rolls from the oven, top with beef, pour the gravy into small bowls, and serve.
Pro-Tip: For the best prime rib sandwich, you want a soft, toasted roll with tender beef. Heat the beef just until it’s warmed through, you don’t want to overcook it or make it tough and chewy.
Best Ways to Serve French Dip Sandwiches
You can keep these sandwiches simple and serve them just with the leftover meat on toasted rolls, or you can add additional toppings.
We love spreading our toasted rolls with homemade horseradish mayo, which adds a creamy, spicy flavour. You can also add thin slices of Swiss cheese, Provolone, or cheddar.
Sauteed mushrooms or sliced onions add another layer of flavor and texture, or you can add sliced, roasted peppers.
We like to serve our sandwiches with crispy french fries or sweet potatoes, but they are so filling that you don’t need to add any sides.
Top Tips & FAQS
- Don’t overheat the beef or it may become tough and dry. It should take less than 10 minutes on medium heat to heat it through.
- Toasting the buns is recommended, as it will prevent the bread from becoming overly soggy and hold up better to dipping.
If you don’t have prime rib, you can use any flavorful beef such as sirloin or striploin.
If you don’t have homemade gravy or au jus, store-bought will work just fine.
More Easy Beef Recipes
Leftover Prime Rib Beef Dip Sandwiches
- 2 hoagie rolls
- 12 oz cooked prime rib
- 1 ½ cups gravy or au jus
- 1 tablespoon butter
- horseradish sauce
- sliced Provolone or Swiss cheese
- sauteed mushrooms
- sauteed onions
- Preheat the oven to broil while you prepare the remaining ingredients.
- Slice the hoagie rolls in half, spread with butter, and place face-up on a baking sheet. Set aside.
- Pour the gravy into a medium-sized pot and heat it over medium heat. While the gravy is heating, heat a large skillet over medium heat and add the leftover roast.
- Let the beef heat for a few minutes, then add about ¼ cup of gravy. Place a lid on the skillet and continue heating.
- Place the rolls in the oven to melt the butter and toast the buns. Watch closely, as they won't take more than a few minutes. You are looking for golden brown.
- Remove the rolls from the oven, top with beef, pour the gravy into small bowls, and serve.
Nutritional information is based on third-party calculations and should be considered estimates. Actual nutritional content will vary with brands used, measuring methods, portion sizes and more.