This Instant Pot Garlic Herb Roast With Blue Cheese Mashed Potatoes is so simple you won’t believe it! Not to mention, it’s delicious!
What if I told you it’s possible to make a flavorful, tender and juicy pork roast with fluffy mashed potatoes with just five minutes prep time? It’s no exaggeration. This Instant Pot Garlic Herb Roast & Blue Cheese Mashed Potatoes is so simple yet so flavorful! This is definitely one of my favorite go-to dinnertime meals.

If your grocer carries the packaged pre-marinated pork loins, look for the garlic herb kind. If you can’t find a prepackaged and marinated version, grab a plain pork loin. Head over to the butcher and ask them if they can add a garlic herb marinade to it and re-wrap it for you (did you know that most grocers do this?). If you don’t feel like asking, you can buy a bottle of garlic herb marinade or make your own by putting the pork in a resealable bag with olive oil, lemon juice, minced garlic, rosemary, thyme, Dijon mustard, and a bit of salt and pepper.
Why You’ll Love Garlic Herb Roast With Blue Cheese Mashed Potatoes
Effortless Cooking: The Instant Pot simplifies the cooking process, allowing you to achieve delicious results with minimal effort and in a fraction of the time.
Flavorful Ingredients: The combination of roasted garlic herb marinated pork loin and crumbled blue cheese adds layers of rich, savory flavors to the dish.
Tender and Juicy: The pressure cooking method of the Instant Pot ensures that the pork loin is cooked to perfection, resulting in tender, juicy, melt-in-your-mouth meat.
Balanced Meal: This garlic herb roast with blue cheese mashed potatoes recipe offers a balanced combination of protein, carbohydrates, and fats, making it a wholesome and satisfying meal.
Impressive Presentation: The final dish is not only delicious but also visually appealing, making it suitable for both casual family dinners and special occasions.
Garlic Herb Roast With Blue Cheese Mashed Potatoes Ingredients Notes
- Pork Loin: Choose one that is about 2 pounds, and when possible, one that is pre-marinated in garlic herb seasoning. If that is not available, you can make your own marinade or ask the butcher to season it for you. See the recipe notes below for a quick DIY marinade.
- Potatoes: Use red or gold potatoes rather than a regular russet. You can use the small potatoes if you prefer, or use larger ones and cut them in half before cooking.
- Blue Cheese Crumbles: Get fresh, high quality crumbles. Stirred into the mashed potatoes, these add a tangy, creamy flavor profile that really elevates the dish.
- Chicken Stock or Broth: About a cup is all you need to add just the right amount of moisture to cook the potatoes and keep the meat juicy.
Find the complete Instant Pot Garlic Herb Roast With Blue Cheese Mashed Potatoes ingredients list with measurements in the recipe card below.

How To Make Instant Pot Garlic Herb Roast With Blue Cheese Mashed Potatoes
Here are the simple steps for this easy garlic herb roast recipe:
- Pour a cup of chicken broth into your Instant Pot. Top with three pounds of red potatoes (cut them in half if they’re large).
- Place trivet over potatoes then set your pork roast on top. Set your timer for 30 minutes.
- When timer is up, set roast on cutting board to rest, leaving potatoes and broth in the pot. Mash the potatoes, stir in the blue cheese, and season with salt and pepper.
- Slice the roast, plate with potatoes, and serve.
It can’t get any easier than that!

Variations, Substitutions, and Cooking Variations
Potato boosters: The broth and blue cheese are enough, but you could also add room-temperature butter, cream cheese, sour cream, and/or milk.
Pork Swap: You can use a different cut of pork, or even swap it out for chicken or turkey breast. Adjust cooking time as necessary.
Additional Vegetables: Incorporate vegetables into the garlic herb roast and mashed potatoes, such as carrots, Brussels sprouts, or green beans, to add color and nutrients.
Blue Cheese Alternatives: If you’re not a fan of blue cheese, you can substitute it with another cheese like goat cheese, feta, or cheddar for a milder flavor.
Chicken Stock Swap: Vegetable broth or even water can be used as a substitute for chicken stock if desired, just keep in mind that water won’t be as flavorful.
Seasonings: Feel free to adjust the seasoning blend to your liking by adding garlic powder, onion powder, paprika, or other favorite herbs and spices.
Searing: Before pressure cooking the meat in the Instant Pot, consider searing it on all sides in a hot skillet to develop a golden crust and enhance flavor.
Garnishes: Sprinkle chopped fresh herbs like parsley or chives over the dish before serving for a pop of color and freshness.
Drizzle: Drizzle some balsamic glaze or olive oil over the plated dish for added flavor and visual appeal.

Instant Pot Garlic Herb Roast & Blue Cheese Mashed Potatoes
This Instant Pot Garlic Herb Roast With Blue Cheese Mashed Potatoes is so simple you won't believe it! Not to mention, it's delicious!
Ingredients
- 1 cup chicken stock or broth
- 3 pounds red potatoes, cut in half if very large
- 1 Roasted Garlic Herb Marinated Pork Loin
- 1/2 cup crumbled blue cheese
- coarse salt & freshly ground black pepper, to taste
Instructions
- Pour chicken broth into pot, then place potatoes into pot directly in the broth. Set the trivet on top of potatoes, then carefully place roast on trivet.
- Close and lock the lid of the Instant Pot. Press “Manual” and immediately adjust the timer to 30 minutes. Check that the cooking pressure is on “high” and that the release valve is set to “Sealing”.
- When time is up, open the IP using “Quick Pressure Release”. Remove the roast and trivet from the pot, leaving behind the potatoes and broth. Set roast on cutting or carving board to rest while you mash the potatoes. Add blue cheese and stir to combine. Season with salt and pepper, then slice roast and serve.
Notes
If you need to make your own garlic herb marinade use:
1/4 cup olive oil
2 T lemon juice
1 t dried rosemary (or a sprig of fresh)
1 t dried thyme (or a sprig of fresh)
salt and pepper to taste
place in a resealable bag with the pork loin, coat well, and let sit for 30 minutes before cooking
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