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Home > Recipes > Non Gluten-Free

Open-Faced Hot Beef Sandwiches

Published: February 12, 2022 • Updated: Mar 7, 2023 • This post may contain affiliate links.

Savory hot beef and gravy piled high on fluffy homemade mashed potatoes and thick-sliced bread. Serve Open-Faced Hot Beef Sandwiches with your favorite vegetable for the best comfort food any night of the week!

Close-up image of finished Open-Faced Hot Beef Sandwich, shown with green beans on a white plate, with a blue checkered towel. Bowl of corn shown in the background.
Jump to:
  • Why you'll love this recipe
  • Ingredients
  • Step-by-step instructions
  • Slow cooker instructions
  • Instructions for mashed potatoes
  • Best bread to use
  • Tips & tricks
  • Recommended tools
  • Storing and reheating
  • More comfort foods
  • Recipe

Why you'll love this recipe

When I think of comfort food, this one is the highest on my list of favorites! Thick bread loaded with fluffy homemade mashed potatoes and savory hot beef and gravy-- YUM. Does it even get any better than this??

Open-Faced Hot Beef Sandwiches are one of the easiest recipes and only require a handful of ingredients. You can make this recipe even easier by using instant mashed potatoes.

Ingredients

Beef and gravy

This super easy hot beef and gravy only takes 4 ingredients, plus water! Here's what you'll need:

  • Beef roast
  • Onion soup mix
  • Brown gravy packets
  • Thick bread
  • Water

Mashed potatoes

To make homemade fluffy mashed potatoes, here's what you need:

  • Potatoes
  • Butter
  • Milk
  • Salt and pepper
Ingredients needed for Hot Beef and Gravy sandwiches.

Step-by-step instructions

Take the chill off the meat by letting it sit at room temperature for 30 minutes.

Sear the roast

This step is completely optional, but totally recommended!

In a large cast iron skillet, heat up two tablespoons of oil over medium-high heat. Blot the roast dry with paper towels.

Sear the meat on one side for 3 minutes, flip, and sear for another 3 minutes. Once a deep brown crust has formed on both sides of the roast, transfer it to the slow cooker.

Slow cooker instructions

Place the roast in the bottom of a 5-to-8-quart slow cooker. Combine the water, onion soup mix, and gravy packets and pour it over the roast.

Cook on low for 6 to 8 hours.

Instructions for mashed potatoes

Scrub, peel, and quarter the potatoes. Place the cut potatoes in a large pot and cover them with cold water.

Peeled and quartered potatoes shown on a white cutting board with a teal colored knife.

Bring the pot to a boil and boil until fork-tender, about 16 to 18 minutes. Drain the potatoes and return them to the pot. Add the butter, milk, salt, and pepper.

Mash the potatoes with a potato masher until smooth.

Shred the beef. Lay down a piece of bread and top with a generous scoop of mashed potatoes and hot beef.

Best bread to use

Any thick-sliced bread, such as Texas Toast, will work great for this recipe. I've also used thick-sliced Brioche and stacked two pieces of regular-sized sandwich bread and they both turned out great!

Tips & tricks

Use different roasts. I think just about any marbled roast will do for this recipe. I have used both a rump roast and a chuck roast and they both turned out amazing.

Sear the roast. For a more flavorful hot beef sandwich, sear the roast until it has a well-caramelized crust. This will help lock in all that delicious flavor.

Save some time. Instead of making homemade mashed potatoes, instant or refrigerated potatoes can be used instead!

Recommended tools

  • Slow Cooker. Easily serve your family hot beef and gravy in this large 7-quart crockpot.
  • Cast Iron Skillet. Sear up a beautifully crusted, caramelized roast for this recipe in one of my favorite skillets.
Image of finished Open-Faced Hot Beef Sandwich, shown with green beans on a white plate, with a blue checkered towel.

Storing and reheating

Refrigerator: Store the hot beef and mashed potatoes separately in airtight containers for up to five days.

Freezer: Freeze the hot beef and mashed potatoes in separate containers for up to three months.

Thaw: Place containers in the refrigerator overnight.

Reheat: Reheat in the microwave in a microwave-safe container.

More comfort foods

  • Easy Tuna Noodle Casserole
  • Cajun Shrimp Alfredo
  • Birria Tacos
  • Cheesy Hash Brown Casserole

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Recipe

Open-Faced Hot Beef Sandwiches
Savory hot beef and gravy piled high on fluffy homemade mashed potatoes and thick-sliced bread. Serve Open-Faced Hot Beef Sandwiches with your favorite vegetable for the best comfort food any night of the week!
4.7 from 19 votes
Print Recipe Pin Recipe
Prep Time 5 mins
Cook Time 8 hrs
Total Time 8 hrs 5 mins
Course Main Course
Cuisine American
Servings 8 people
Calories 721 kcal

Equipment

  • slow cooker
  • cast iron skillet

Ingredients
  

Hot Beef & Gravy

  • 3 lbs beef roast chuck or rump
  • 1 pkg (1 oz) onion soup mix
  • 4 pkg (0.87 oz) brown gravy
  • 4 c water

Mashed Potatoes

  • 5 lbs Russet potatoes scrubbed and peeled
  • 1 stick butter
  • ¼ c milk
  • salt and pepper to taste
  • 8 pieces thick bread (Texas toast)

Instructions
 

  • OPTiONAL. Sear the roast. See recipe notes below.
  • Place the roast in the bottom of a 5-to-8-quart slow cooker.
  • Mix together onion soup mix, gravy, and water. Pour over beef.
  • Cook on Low for 6 to 8 hours.
  • Scrub, peel, and quarter the potatoes. Place cut potatoes in a large pot and cover with water.
  • Bring to a boil and cook until soft, about 16 to 18 minutes. Drain and return to the pot. Add the butter, milk, salt, and pepper, and mash the potatoes with a potato masher, until smooth.
  • Shred the beef. Lay down a piece of bread and top with a generous scoop of mashed potatoes and hot beef.

Notes

SEARING THE ROAST
  • Let the roast sit at room temperature for 30 minutes.
  • Blot the roast dry with paper towels.
  • In a large skillet, heat up two tablespoons of oil over medium-high heat.
  • Sear the meat for 3 minutes, flip, sear for another 3 minutes.
  • Once a deep brown crust has formed, transfer it to a slow cooker.
 

Nutrition

Calories: 721kcalCarbohydrates: 84.1gProtein: 49gFat: 22.6g
Nutritional Disclaimer

The nutritional information provided is only an estimate. For accurate results, we recommend calculating the nutritional information based on the ingredients and brands you use.

Keyword beef and gravy, hot beef sandwich, slow cooker
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Hi, I'm Ashleigh and I'm passionate about creating healthy, flavorful dishes using fresh, seasonal ingredients.

As a recipe developer, food blogger, and avid cook, my goal is to inspire you to cook wholesome meals that are both simple and vibrant. Our recipes are designed to be accessible to all levels of home cooks and are so delicious that you'll want to make them again and again.

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