Grilled Sirloin Roast with Peppercorn Sauce

Set the grill to high. Oil the grate. This is the part most people skip and then wonder why everything sticks. Takes 15 minutes to get everything ready, 28 minutes on the heat, and you’re done. Rest it after and the whole thing comes together in 43 minutes.

Why You’ll Love This Grilled Sirloin Roast

Cooks fast enough for a weeknight but tastes like you actually know what you’re doing. One roast. One grill. One creamy sauce that takes five minutes while the meat rests. Spice-crusted and medium-rare in the center — the grill does the heavy lifting. You just watch it. Pairs with literally anything. Potatoes. Greens. Nothing at all. Leftovers get better cold, maybe better than hot. The sauce breaks if you’re not careful, but it doesn’t. Just works.

What You Need for Grilled Sirloin Roast with Spiced Crust

One sirloin roast around 650 grams. Trussed already or do it yourself with kitchen twine. Kosher salt. Three-quarters of a teaspoon. Not table salt. The grain is bigger and it sticks to the meat instead of disappearing. Coriander seeds and cumin seeds — a half teaspoon each. Not ground. Whole seeds. You’re crushing them yourself because ground spices go stale fast. Black peppercorns. Half a teaspoon. Crush them in the mortar with the coriander and cumin. Crushed chili flakes. A quarter teaspoon. Adds heat without tasting like pure pepper. Olive oil. One and a third tablespoons. Just enough to coat the whole roast evenly.

For the shallot pan sauce — one small shallot minced fine. Butter. All-purpose flour. Heavy cream and chicken stock, equal parts. Worcestershire sauce. Smoked paprika. Salt and pepper. That’s it.

How to Make Grilled Sirloin Roast

Get the grill hot. High heat. Let it sit for a few minutes. Then oil the grate really well — grab a paper towel, soak it in oil, grab it with tongs, run it over the bars. Sticks happen if you skip this.

Crush the salt with the coriander and cumin seeds. Add the peppercorns, the chili. Crush everything together in a mortar or spice grinder until it’s powdery but still has some texture. Not dust. Close to it.

Pat the roast dry. Rub the spice blend all over it. Every side. The ends too. Then coat it with olive oil so it glistens. The oil helps the spices stay and the crust brown darker.

Drop the grill down to medium-high. Too hot and the outside burns before the inside cooks. Place the roast on the grate and don’t touch it for a minute. Let it sear. Then turn it — 90 degrees, wait, turn again. You want all four long sides browned, the ends too. Close the lid.

Cook about 28 minutes, turning occasionally so one side doesn’t char too much. You’re aiming for 50°C inside, about 122°F on a meat thermometer. That’s rare. If you want medium-rare, go to 55°C. Check it at 25 minutes the first time you make it. Temperature varies with grill temperature, wind, the mood of your grill.

Pull it off. Tent it with foil. Let it rest 12 minutes. This is not optional. This is where the juices settle back into the meat instead of running all over your plate.

How to Get a Perfect Crust on Grilled Sirloin Roast

The spice blend matters because it’s toasted. Whole seeds have oil in them. When they hit hot metal they release that oil and burn slightly in a good way. Ground spices just taste dusty.

Sear all sides. Don’t skip the ends — the meat there is tender and if you get the outside brown it looks like you know what you’re doing.

Keep the lid down most of the time. The grill becomes an oven. The meat cooks through while the outside gets darker.

Turn it every five or six minutes. Rotating prevents flare-ups from burning one side. Also the roast cooks more evenly. You’re looking for brown that’s almost charred, but not actually charred — that specific color between caramel and dark toast.

The internal temperature is everything. 50°C if you like it bleeding. 55°C if you like it pink all the way through but not cold. Don’t guess. Get a thermometer. Poke it into the thickest part, away from the bone. Wait three seconds. That’s your number.

Grilled Sirloin Roast Tips and Common Mistakes

Rest it. Seriously. If you slice right off the grill the juices pour out and the meat dries. Twelve minutes under foil. The carryover heat brings it up a degree or two anyway.

The sauce goes in a separate pan while the roast rests. Melt the butter over medium-high. Sauté the minced shallot until it goes from white to translucent and the edges start to brown — that’s about three minutes. Then stir in the flour. Cook it for one minute, stirring the whole time, so the flour isn’t raw.

Whisk in the cream and stock slowly. If you dump them all at once it breaks into clumps. Slow means smooth. Add the Worcestershire, the cracked pepper, the paprika. Salt it now. Bring it to a gentle boil while stirring. Simmer for three minutes. That thickens it just enough that it coats the spoon instead of running off.

Never let it boil hard. Heat breaks cream. A gentle bubble at the edges. That’s the move.

Slice the roast against the grain. The grain runs along the length. Slice perpendicular to that, not parallel. Against the grain means the fibers are short and it chews soft instead of chewy.

Most people under-rest the meat. They’re hungry. Don’t be that person. The 12 minutes is nonnegotiable.

Grilled Sirloin Roast with Peppercorn Sauce

By Emma

Prep:

15 min

Cook:

28 min

Total:

43 min

Servings:

6 servings

Ingredients

• 1 (approx 650 g) sirloin roast, trussed
• 3 ml (¾ tsp) kosher salt
• 2.5 ml (½ tsp) coriander seeds
• 2.5 ml (½ tsp) cumin seeds
• 2.5 ml (½ tsp) black peppercorns
• 1.5 ml (¼ tsp) crushed chili flakes
• 20 ml (1 1/3 tbsp) olive oil
• Sauce:
• 1 small shallot, finely minced
• 25 ml (1 2/3 tbsp) unsalted butter
• 15 ml (1 tbsp) all-purpose flour
• 120 ml (½ cup) heavy cream 35%
• 120 ml (½ cup) chicken stock
• 5 ml (1 tsp) Worcestershire sauce
• 2.5 ml (½ tsp) cracked black pepper
• 1 ml (¼ tsp) smoked paprika
• Salt and black pepper, to taste

Method

1. ===
2. 1 Grill roast:
3. 2 Heat grill to high. Oil grate well. Crush salt with coriander, cumin, peppercorns in spice grinder or mortar until powdery.
4. 3 Rub spice blend over roast. Coat with oil evenly. Drop heat to medium-high.
5. 4 Place roast on grill. Sear all sides, turning to brown thoroughly. Close lid.
6. 5 Cook about 28 minutes, turning occasionally, until internal temp hits 50°C (122°F) for rare.
7. 6 Remove from grill. Tent with foil. Rest 12 minutes for juices to settle.
8. ===
9. 7 Make sauce:
10. 8 Meanwhile, melt butter in skillet over medium-high.
11. 9 Add shallots. Sauté until translucent and starting to brown, about 3 minutes.
12. 10 Stir in flour; cook 1 minute stirring constantly.
13. 11 Slowly whisk in cream and chicken stock.
14. 12 Add Worcestershire, cracked pepper, paprika. Salt to taste.
15. 13 Bring to gentle boil while stirring.
16. 14 Simmer 3 minutes for sauce to thicken slightly. Remove from heat.
17. ===
18. 15 Serve:
19. 16 Discard trussing. Thinly slice roast against grain.
20. 17 Plate slices and spoon sauce on top or alongside.
21. 18 Pairs well with beer-roasted potatoes and Brussels sprouts.

Nutritional information

Calories

410

Protein

38g

Carbs

5g

Fat

28g

Print Recipe Save to Pinterest

Frequently Asked Questions About Grilled Sirloin Roast

Can I cook this roast in the oven instead of grilling? Yeah, but why. High broiler setting, sear all sides in a hot pan first, then finish at 200°C until it hits temperature. Not the same crust. Grill does it better.

What temperature should the roast be inside? 50°C for rare. 55°C for medium-rare. Beyond that and the point of sirloin disappears — too lean. Use a meat thermometer. Don’t guess.

How long do I rest it? Twelve minutes minimum. Longer is fine — it stays warm under foil. Shorter and the juices run everywhere. Not negotiable.

Can I make the sauce ahead? Make it right before you serve. Takes five minutes anyway. If you make it ahead it breaks when you reheat it. Cream sauces are like that.

What if my roast comes out too rare in the middle? Grill temps vary. Wind, outside air, how well your grill holds heat. Start checking at 25 minutes next time instead of waiting for 28. Add a minute or two if you need it.

Is there a substitute for Worcestershire sauce? Skip it if you don’t have it. The sauce is good without. Soy sauce would be weird here — doesn’t fit the flavor. Just don’t bother.