Looking for an easy way to make a tender, flavourful beef roast? This Instant Pot Sirloin Roast with Mashed Potatoes is a delicious comfort food dinner that comes together quickly in the pressure cooker. The sirloin roast cooks until tender and flavorful, while the potatoes make the perfect hearty side dish for a satisfying family meal.

Using the Instant Pot is a convenient way to enjoy a classic roast dinner without spending hours in the oven. This Instant Pot roast recipe is simple enough for a weeknight dinner but special enough for Sunday supper or a family gathering.

If you love easy beef recipes and homemade mashed potatoes, this comforting meal is sure to become a favorite.

Printable Recipe Card with a Full List of Ingredients and Instructions is Located at the Bottom of the Post.

Be sure to read through the entire post so that you don’t miss out on any important tips and tricks!

The first step to make Instant Pot Sirloin Roast with Mashed Potatoes was to peel and cut the potatoes.  How many depends on how many people you have eating the meal.  I used 6 large potatoes and then placed them in a steamer basket.

The next step was to pour the olive oil into the Instant Pot and turn the Pot to the saute function.  I also sprinkled in a teaspoon of Montreal Steak Spice for extra flavour.

Then I lowered the sirloin roast into the Instant Pot and sprinkled about a half teaspoon of Montreal Steak Spice on top of it.

I seared the sirloin roast on both sides for about 3 minutes a side.

Using a large serving fork I removed the roast to a plate, turned the sauté function off and added in the beef broth.  I made sure to scrape all the brown bits from the bottom of the pot. 

This deglazing step is very important.

After deglazing, I placed the trivet in the Pot and lowered the seared roast on top of it.

I placed the steamer basket full of potatoes on top of the roast.

Then I placed the lid on the Instant Pot, turned the steam release handle to the sealing position and set the Instant Pot to Pressure Cook High for 32 minutes.

When the Instant Pot was done cooking, I allowed it to natural release for 8 minutes.

Then I turned the steam release handle to the venting position to finish with a quick release.

After removing the lid I used oven mitts to carefully remove the steamer basket full of potatoes and the roast.

I also poured off the broth.  To 2 cups of broth I added the two packets of beef gravy mix and placed it in the microwave for 3 minutes stirring once.

While the gravy was cooking I returned the potatoes to the Instant Pot and added some of the remaining broth and 2 tablespoons of margarine.

I used a potato masher to make the mashed potatoes.

This Instant Pot Sirloin Roast with Mashed Potatoes is an easy and comforting dinner that brings all the flavours of a traditional roast meal to the table with less cooking time. The tender beef pairs perfectly with fluffy mashed potatoes, making this a hearty meal the whole family can enjoy.

Serve this Instant Pot sirloin roast with your favorite vegetables or a simple salad for a complete dinner. Whether you're looking for an easy Sunday dinner, a comforting family meal, or a simple pressure cooker beef recipe, this roast is a delicious option you'll want to make again and again.

Printable Recipe Card with a Full List of Ingredients and Instructions is Located at the Bottom of the Post.

 

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PRINTABLE VERSION OF THE RECIPE CAN BE FOUND AT THE BOTTOM OF THE PAGE

Ingredients You'll Need to Make this Instant Pot Sirloin Roast with Mashed Potatoes:

• 6 large potatoes peeled and cut
• 2 tablespoon olive oil
• 1 ½ teaspoon Montreal Steak Spice
• 2 lb sirloin oven roast
• 3 cups beef broth
• 2 tablespoon margarine
• 2 packets gluten free beef gravy powder (25 grams each)

How to Make Instant Pot Sirloin Roast with Mashed Potatoes:

1. Peel and cut potatoes. Place them in a steamer basket for the Instant Pot or they can be placed around the meat before putting the lid on.
2. Pour olive oil into Instant Pot and set to saute function. Sprinkle 1 teaspoon of the Montreal Steak Spice over the oil in the Pot.
3. Lower the sirloin roast into the instant pot and sprinkle the top with ½ teaspoon Montreal Steak Spice. Sear both sides for about 3 minutes a side.
4. Remove the roast from the Pot.
5. Add the beef broth and scrape the bottom of the pot very well to deglaze.
6. Return the roast to the Pot placing it on wire rack.
7. Place the steamer basket with the potatoes on top of the roast.
8. Place the lid on the Instant Pot, turn the steam release handle to the sealing position and set the Instant Pot to Pressure Cook High for 32 minutes.
9. When the Instant Pot is done cooking, allow it to natural release for 8 minutes. Then turn the steam release handle to the venting position to finish with a quick release.
10. Using oven mitts carefully remove the potatoes and the roast.
11. Pour the broth into a measuring cup. Use 2 cups of broth and add the two packets of gravy mix to it.
12. Stir well and then place the gravy in the microwave on high for 3 minutes, stirring once.
13. While gravy is cooking return the potatoes to the Instant Pot. Add some of the remaining broth and 2 tablespoons of margarine. Use a potato masher to make the mashed potatoes.
14. Slice the roast and serve with your favourite sides.

FAQs:

What should I serve with Instant Pot sirloin roast?

You can serve the roast with roasted carrots, green beans, peas, corn, Brussels sprouts, or a fresh garden salad.

How do I store leftover sirloin roast?
Store leftover cooked beef in an airtight container in the refrigerator. Properly stored leftovers can generally be enjoyed within 3 to 4 days.

Can I freeze leftover Instant Pot sirloin roast?
Yes. Allow the roast to cool, then place it in a freezer-safe container or tightly sealed freezer bag. For the best quality, use frozen leftovers within a few months.

How do I reheat leftover sirloin roast?
Reheat leftovers gently to help prevent the beef from becoming dry. You can reheat individual portions in the microwave or warm larger portions covered in the oven with a little broth or cooking liquid.

Is Instant Pot sirloin roast good for a Sunday dinner?
Absolutely! This easy Instant Pot beef roast makes a comforting Sunday dinner without requiring hours of oven cooking. Serve it with mashed potatoes and your favorite vegetables for a classic roast dinner.