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Mustard and Thyme Baron of Beef Au Jus

The scent of roasting beef, infused with garlic, mustard, and thyme, always transports me back to my grandmother’s kitchen. She had a knack for making even the simplest cuts of meat taste like a king’s feast. I remember standing on a stool, mesmerized as she meticulously scored the roast, tucking slivers of garlic into each crevice, a fragrant promise of the delicious meal to come. It wasn’t just the taste; it was the warmth, the family gathered around the table, and the feeling of being utterly, completely loved. This recipe, adapted from her notes, is my attempt to recreate that magic and share it with you.

Recipe Overview

Prep Time: 24 hours 30 minutes
Cook Time: 1 hour 10 minutes to 1 hour 40 minutes, depending on desired doneness
Total Time: 25 hours 50 minutes to 26 hours 20 minutes
Servings: 8
Yield: Approximately 8 servings of sliced roast with au jus
Dietary Type: Gluten-Free (naturally), Dairy-Free

Ingredients

1 (3 lb) top round roast (baron-of-beef roast)
6-8 fresh garlic cloves (sliced in half)
3 tablespoons oil
2 tablespoons Dijon mustard
1 teaspoon dried thyme
Black pepper
4 cups beef stock, divided

Equipment Needed

Shallow roasting pan
Plastic wrap
Plate
Aluminum foil
Wooden spoon
Electric knife or sharp carving knife

Instructions

The evening before you plan to cook, prepare the roast: slice small slits all over the top round roast (baron-of-beef roast). Then, generously stuff each slit with the garlic clove halves. Ensure the garlic is nestled within the meat for maximum flavor infusion.
In a small bowl, combine the oil and Dijon mustard. Rub the entire top round roast with oil, then brush the top and sides with the mustard mixture. Sprinkle evenly with dried thyme and black pepper. Be generous with the pepper, as it adds a lovely warmth to the finished dish.
Place the prepared top round roast into a shallow roasting pan. It’s crucial not to use a rack; instead, set the roast directly on the pan. If the roast has a layer of fat, position it fatty-side up. This will render during cooking, basting the meat naturally.
Cover the roasting pan tightly with plastic wrap, ensuring the plastic doesn’t directly touch the mustard mixture to avoid removing it. Refrigerate for 24 hours, or up to 2 days. This allows the flavors to deeply penetrate the meat.
The following day, remove the roasting pan from the refrigerator and discard the plastic wrap. Allow the top round roast to sit out on the counter to come down to almost room temperature. This is an important step. It might take a couple of hours or more, but letting the meat relax before cooking significantly improves tenderness and juiciness.
Preheat your oven to 450°F (232°C). Make sure your oven is fully preheated before placing the roast inside for optimal searing.
Pour 1 cup of beef stock into the roasting pan. This will prevent the drippings from burning and create the foundation for the delicious au jus.
Roast the top round roast uncovered for 20 minutes in the preheated 450°F (232°C) oven. This initial high-heat searing helps to develop a rich, flavorful crust.
After the initial 20 minutes of searing, reduce the oven temperature to 325°F (163°C).
Continue to cook the top round roast until it reaches your desired doneness. Keep in mind that these times are specifically for a 3-pound roast. You will need to adjust cooking times for larger roasts. Use a meat thermometer for best accuracy.
- For a rare roast, cook for approximately 50 minutes more.
- For medium-rare, cook for approximately 60 minutes more.
- For medium, cook for approximately 70 minutes more.
- For medium-well, cook for approximately 80 minutes more.
Once the top round roast is cooked to your liking, remove it from the roasting pan and transfer it to a plate. Tent loosely with aluminum foil to prevent it from drying out. This resting period allows the juices to redistribute throughout the meat, resulting in a more tender and flavorful roast.
To make the Au Jus, place the roasting pan on the stovetop over medium heat.
Add the remaining 3 cups of beef stock to the roasting pan. Use a wooden spoon to scrape the bottom of the pan, releasing all the flavorful browned bits (the fond).
Gently simmer the au jus for 4-5 minutes, adjusting the heat downwards as needed to maintain a gentle simmer. This allows the flavors to meld together and the sauce to slightly reduce and thicken.
Using an electric knife (if you have one) or a sharp carving knife, slice the top round roast as thinly as possible against the grain.
Serve immediately, drizzling generously with the homemade au jus.

Expert Tips & Tricks

For an even richer flavor, consider using homemade beef stock instead of store-bought.
If the au jus is too thin, thicken it with a cornstarch slurry (1 tablespoon cornstarch mixed with 2 tablespoons cold water). Add slowly while simmering until desired consistency is reached.
Don’t overcrowd the roasting pan if you are cooking multiple roasts. This can lower the oven temperature and result in uneven cooking.
For a deeper, more complex flavor, add a splash of red wine to the au jus while it simmers.

Serving & Storage Suggestions

Serve this Mustard and Thyme Baron of Beef Au Jus hot, sliced thinly, and drizzled generously with the au jus. It’s excellent with roasted vegetables like potatoes, carrots, and Brussels sprouts. A side of creamy mashed potatoes or a crusty baguette for soaking up the flavorful sauce are also great choices.

Leftover roast can be stored in an airtight container in the refrigerator for up to 3-4 days. The au jus should be stored separately in a sealed container. Reheat the roast gently in the oven or microwave, and reheat the au jus on the stovetop. You can also freeze the cooked roast for up to 2-3 months. Wrap it tightly in plastic wrap and then foil to prevent freezer burn. Thaw in the refrigerator overnight before reheating.

Nutritional Information

Nutrient	Amount per Serving	% Daily Value
Calories	342 kcal	17%
Total Fat	19g	29%
Saturated Fat	6.1g	30%
Cholesterol	117.4mg	39%
Sodium	591.5mg	24%
Total Carbohydrate	1.1g	0%
Dietary Fiber	0.2g	0%
Sugars	0.1g	0%
Protein	39.2g	78%

Note: Nutritional information is an estimate and can vary based on specific ingredients and portion sizes.

Variations & Substitutions

Herb Variations: Experiment with different herbs such as rosemary, sage, or oregano instead of thyme.
Spicy Kick: Add a pinch of red pepper flakes to the mustard mixture for a touch of heat.
Wine Infusion: Deglaze the pan with 1/2 cup of dry red wine before adding the beef broth for a richer au jus.
Gluten-Free Option: This recipe is naturally gluten-free. Ensure that the beef stock you use is also gluten-free.
Mustard Alternatives: If you don’t have Dijon mustard, you can use yellow mustard or even a grainy mustard for a different flavor profile.

FAQs (Frequently Asked Questions)

Q: Why is it important to let the roast sit at room temperature before cooking?
A: Bringing the roast to near room temperature allows the muscle fibers to relax, resulting in a more tender and evenly cooked piece of meat.

Q: Can I use a different cut of beef for this recipe?
A: While this recipe is designed for a top round roast (baron-of-beef), you could potentially use other cuts like bottom round or sirloin tip roast, but cooking times may need adjustments.

Q: How do I know when the roast is cooked to the correct temperature?
A: Use a meat thermometer inserted into the thickest part of the roast, avoiding bone. Refer to a reliable temperature chart for desired doneness.

Q: Can I make the au jus ahead of time?
A: Yes, the au jus can be made ahead of time and stored in the refrigerator for up to 3 days. Reheat gently on the stovetop before serving.

Q: What if I don’t have a roasting pan?
A: You can use a large oven-safe skillet or Dutch oven as a substitute, ensuring it’s large enough to accommodate the roast comfortably.

Final Thoughts

I truly hope you’ll try this recipe for Mustard and Thyme Baron of Beef Au Jus. It’s a testament to the idea that delicious, comforting meals don’t always require expensive cuts of meat. With a little patience and attention to detail, you can transform a humble roast into a truly memorable dining experience. Please share your feedback and experiences with me; I’d love to hear how it turns out for you. Consider pairing this roast with a bold red wine like Cabernet Sauvignon or a hearty Merlot for a truly satisfying meal.

Mustard and Thyme Baron of Beef Au Jus Recipe