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Slow Cooker French Onion Roast is simple yet full of flavor. Perfect comfort food on a chilly winter night. Simple ingredients slow cook all day to make the richest, most delicious pot roast.
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French Onion Roast

Slow Cooker French Onion Roast is simple yet full of flavor. Perfect comfort food on a chilly winter night.
Course Main Course
Cuisine American
Keyword french onion roast
Prep Time 10 minutes
Cook Time 8 hours
Total Time 8 hours 10 minutes
Servings 6 servings
Author Meg's Everyday Indulgence

Equipment

  • Slow Cooker

Ingredients

  • 1 Tbsp. vegetable oil
  • 1 tsp. kosher salt
  • 1 1/2 tsp. black pepper, divided
  • 2 1/2 lb. chuck roast
  • 1 pkg. onion soup mix
  • 1 14.5 oz. can beef broth
  • 1 Tbsp. worcestershire sauce
  • 1 Tbsp. Dijon mustard
  • 2 Tbsp. butter
  • 2 Tbsp. cornstarch
  • 2 Tbsp. cold water

Instructions

  • Heat a large skillet over medium-high heat. Season roast with kosher salt and 1 teaspoon black pepper. Add vegetable oil to hot skillet. Add roast and sear each side, about 2 mintues per side.
  • Meanwhile, add soup mix, beef broth, worcestershire sauce, Dijon mustard, butter and remaining 1/2 teaspoon pepper. Whisk well. Once done searing the roast, add it to the slow cooker. Flip so both sides get coated in the sauce.
  • Cook on low for 6 to 8 hours or high for 4 to 5 hours.
  • After time has elapsed, remove the roast from the slow cooker to a plate. In a small bowl, whisk together the cornstarch and cold water. Add to slow cooker and whisk well. Return roast to slow cooker and cook another 10 minutes, until sauce is thickened and glossy.