Instant Pot Pot Roast locks in moisture fast under pressure—big flavor without spending all night at the stove.
Pressure-Perfect Pot Roast: A Vegetable-Forward Braise in an Instant
A whole cauliflower and baby potatoes get the slow-braised treatment in an Instant Pot—deep, savory flavor and fork-tender texture without an all-afternoon commitment.
Think of this as a braise that learned to be efficient. Instead of hours of oven time, you get all the caramelized-onion, wine-reduced comfort of a traditional pot roast in about an hour. Keeping the cauliflower whole gives the dish a dramatic centerpiece while baby potatoes, carrots and cremini mushrooms soak up a broth that’s rich with tomato paste, smoked paprika and a hit of red wine. The result is hearty and vegetable-forward rather than heavy—perfect when you want a substantial dinner without meat or a long wait.
The flavor build is small-steps-big-payoff: sautéing the onion and carrots first creates sweet, browned notes; mushrooms add a silky, savory base; tomato paste and smoked paprika bloom in the pan; and the wine deglazes every browned bit into the sauce. Low-sodium soy and white miso bring rounded umami that reads deep and savory, not salty. Pressure cooking locks in moisture so the cauliflower’s florets become melt-in-your-mouth while the stem holds the head together for an attractive whole-vegetable presentation.
Practical perks: prep is simple—trim the cauliflower, halve larger baby potatoes, slice the mushrooms, and you’re mostly assembling layers. Whisk miso into a little warm broth so it dissolves smoothly, and be sure to deglaze the pot thoroughly so nothing sticks during pressure cooking. Leftovers reheat beautifully and the braising liquid makes a lovely gravy for mashed potatoes, polenta or crusty bread. Serve with a few fresh thyme sprigs and a squeeze of lemon if you like a bright finish.
Ingredients
How to Make Instant Pot Pot Roast
- Prepare the vegetables: remove the outer leaves and core from the cauliflower and keep it whole; halve any large baby potatoes, cut carrots into 2-inch pieces, slice mushrooms, finely slice the onion and mince the garlic.
- Set the Instant Pot to Sauté (medium-high) and heat the olive oil. Add the onion and carrots and cook, stirring occasionally, until the onion is softened and starting to brown, about 5 minutes.
- Add the mushrooms and cook 3–4 minutes until they give off liquid and begin to brown. Stir in the tomato paste, smoked paprika and minced garlic and cook 30–60 seconds to bloom the flavors.
- Pour in the red wine to deglaze, scraping any browned bits from the bottom of the pot. Stir in the vegetable broth, soy sauce and miso (whisk the miso into a little warm broth first if it’s stiff). Add the thyme, rosemary and bay leaf.
- Nestle the potatoes and carrots into the liquid and place the whole cauliflower stem-side down on top so it’s partially submerged. Secure the lid, seal the valve, and pressure cook on High for 8 minutes.
- Allow a 10-minute natural pressure release, then carefully quick-release any remaining pressure and remove the lid. Transfer the cauliflower to a cutting board and remove and discard the herb stems and bay leaf.
- Make a slurry with the cornstarch and cold water; set the Instant Pot to Sauté and stir the slurry into the cooking liquid. Simmer 2–3 minutes until the gravy thickens and glossy; taste and adjust salt and pepper.
- Slice the cauliflower into wedges, arrange on a platter with the potatoes, carrots and mushrooms, and spoon the gravy over everything. Pull thyme leaves from the stems and scatter over the dish before serving.
Recipe Card
Instant Pot Pot Roast
Instant Pot Pot Roast locks in moisture fast under pressure—big flavor without spending all night at the stove.
- Prep
- 20 min
- Cook
- 35 min
- Servings
- 4
Ingredients
Instructions
- Prepare the vegetables: remove the outer leaves and core from the cauliflower and keep it whole; halve any large baby potatoes, cut carrots into 2-inch pieces, slice mushrooms, finely slice the onion and mince the garlic.
- Set the Instant Pot to Sauté (medium-high) and heat the olive oil. Add the onion and carrots and cook, stirring occasionally, until the onion is softened and starting to brown, about 5 minutes.
- Add the mushrooms and cook 3–4 minutes until they give off liquid and begin to brown. Stir in the tomato paste, smoked paprika and minced garlic and cook 30–60 seconds to bloom the flavors.
- Pour in the red wine to deglaze, scraping any browned bits from the bottom of the pot. Stir in the vegetable broth, soy sauce and miso (whisk the miso into a little warm broth first if it’s stiff). Add the thyme, rosemary and bay leaf.
- Nestle the potatoes and carrots into the liquid and place the whole cauliflower stem-side down on top so it’s partially submerged. Secure the lid, seal the valve, and pressure cook on High for 8 minutes.
- Allow a 10-minute natural pressure release, then carefully quick-release any remaining pressure and remove the lid. Transfer the cauliflower to a cutting board and remove and discard the herb stems and bay leaf.
- Make a slurry with the cornstarch and cold water; set the Instant Pot to Sauté and stir the slurry into the cooking liquid. Simmer 2–3 minutes until the gravy thickens and glossy; taste and adjust salt and pepper.
- Slice the cauliflower into wedges, arrange on a platter with the potatoes, carrots and mushrooms, and spoon the gravy over everything. Pull thyme leaves from the stems and scatter over the dish before serving.
Nutrition
- Carbohydrates
- 49
- Saturated Fat
- 0.8
- Sodium
- 650
- Fiber
- 8.5
- Unsaturated Fat
- 6
- Protein
- 7
- Fat
- 7
- Cholesterol
- 0
- Trans Fat
- 0
- Calories
- 290
- Sugar
- 6