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Does Instant Pot Omni Plus replace oven cooking for busy families? It’s the question I kept seeing in reviews that never got a straight answer — because most comparisons focus on specs rather than on what actually happens when you run a real family’s weekly meals through it for weeks on end.
I tested the Omni Plus against our conventional oven across a full month of family cooking — weeknight dinners, weekend roasts, baked goods, reheating, and everything in between. Here’s what it genuinely replaces, what it handles differently, and where the conventional oven still wins.
What the Instant Pot Omni Plus Actually Does
The Omni Plus 18L is an oven-style air fryer with eight cooking functions: air fry, bake, broil, roast, toast, dehydrate, warm, and rotisserie. At 18 liters, it’s large enough to cook a whole chicken, a full sheet pan of vegetables, or a 12-inch pizza — which puts it in a different category from compact basket air fryers that top out at 6 quarts.
The stainless steel interior and included accessories — air fry basket, baking pan, cooking rack, and rotisserie spit — cover most of what a conventional oven handles on a weeknight basis. The question is whether “covers most of it” is close enough to “replaces it” for a real family cooking real meals.
What the Omni Plus Replaces Completely
After a month of testing, these are the cooking tasks where the Omni Plus matched or outperformed our conventional oven consistently enough that I stopped using the oven for them entirely:
Roasted vegetables. The Omni Plus air fry function produces better roasted vegetables than our conventional oven at equivalent temperatures — crispier edges, more even browning, faster cook time. A sheet pan of broccoli, carrots, and zucchini that takes 25 minutes in the oven takes 14–16 minutes in the Omni Plus with better texture. This is the clearest win.
Whole roasted chicken. The rotisserie function produces a genuinely excellent whole chicken — evenly browned skin, juicy interior, rendered fat that drips away from the meat during the cook. Our conventional oven produces comparable results but requires 20 minutes more cook time and produces a chicken that’s slightly less evenly browned without basting.
Frozen proteins. Chicken pieces, fish fillets, shrimp — the Omni Plus handles all of these faster and with better texture than the conventional oven. The air circulation produces results that would require a convection oven setting to match in a standard oven.
Toast and reheating. The toast function is straightforwardly better than an oven for small quantities. Reheating leftovers — pizza, fries, chicken — produces results that restore the original texture in a way a conventional oven does but a microwave cannot.
Weeknight dinners under one hour. For the category of meals that most families cook most often — proteins plus a vegetable side, done in under an hour — the Omni Plus handles the full scope without needing the conventional oven at all.
The Omni Plus rotisserie function — whole chicken, evenly browned skin, juicy interior. One of the clearest cases where it outperforms a conventional oven.
What the Omni Plus Handles Differently (But Adequately)
Baking. The Omni Plus bake function works for most baked goods — cookies, muffins, quick breads, casseroles. The results are acceptable and in some cases good. The caveat is that the smaller cavity and more aggressive air circulation can produce faster browning than expected, which means the first time you bake something new in the Omni Plus, you should check it 5 minutes earlier than the recipe suggests. Once you know the timing adjustment, baking works reliably.
Larger baking projects. A standard 9×13 baking pan fits in the Omni Plus, but it’s a snug fit. Bundt cakes, angel food cake pans, and larger casserole dishes may not fit depending on their dimensions. For families that bake large-format items regularly, this is worth measuring before assuming the Omni Plus handles it.
Multiple racks simultaneously. The Omni Plus can use two racks at once, but airflow is less even across both racks than in a full-size convection oven. Items on the upper rack brown faster than items on the lower rack. Rotating halfway through largely solves this, but it requires attention that a full-size oven doesn’t.
Where the Conventional Oven Still Wins
Large-format cooking. A full-size turkey, a large leg of lamb, or a double batch of lasagna in a deep roasting pan — these exceed what the Omni Plus cavity can handle. For holiday cooking or large gatherings, the conventional oven is still necessary.
Multiple dishes simultaneously. A full-size oven with multiple racks can run a roast on the bottom rack, a vegetable side on the middle rack, and keep bread warm on the top rack at the same time. The Omni Plus’s 18-liter cavity doesn’t provide that level of simultaneous multi-dish capacity.
Precise low-temperature baking. For bread baking that requires steam injection, delicate pastries that need precise humidity control, or soufflés that require perfectly stable heat — the conventional oven’s larger, more stable thermal mass performs more predictably than the Omni Plus’s aggressive air circulation.
Instant Pot Omni Plus vs Conventional Oven: Side-by-Side
| Cooking Task | Omni Plus | Conventional Oven |
|---|---|---|
| Roasted vegetables | ✅ Better — crispier, faster | Good but slower |
| Whole roasted chicken | ✅ Better — rotisserie result | Good but longer cook time |
| Frozen proteins | ✅ Better — faster, crispier | Works but slower |
| Everyday baking | ✅ Adequate with timing adjustment | More predictable |
| Large-format cooking | ❌ Capacity limit | ✅ No limit |
| Multiple dishes at once | ⚠️ Limited capacity | ✅ Better |
| Preheat time | ✅ 5–8 min | 15–20 min |
| PFAS-free cooking surface | ✅ Stainless steel | Varies by oven |
A full family dinner from the Omni Plus — roasted protein, vegetable side, all in under 45 minutes without touching the conventional oven.
The Honest Answer for Families
For 80–85% of what a typical family cooks on a weekly basis — weeknight proteins, vegetable sides, frozen foods, reheating, and standard baking — the Instant Pot Omni Plus handles it completely and often better than a conventional oven. The preheat time advantage alone saves meaningful time across a week of daily cooking.
For the remaining 15–20% — large-format holiday cooking, multiple simultaneous dishes, delicate precision baking — the conventional oven is still the right tool. If your household does a lot of that category of cooking, the Omni Plus supplements your oven rather than replacing it.
For families whose weekly cooking falls primarily in the weeknight dinner and standard meal category — which describes most households — the Omni Plus genuinely replaces the conventional oven for day-to-day use. We used our conventional oven twice in the full month of testing, both times for large-format cooking that exceeded the Omni Plus’s capacity.
Does Instant Pot Omni Plus Replace a Regular Oven: The Bottom Line
For everyday family cooking — yes, it replaces the conventional oven for most of what families actually cook most of the time. For large-format or high-precision cooking — no, the conventional oven is still the right tool for those tasks. The Omni Plus is a genuine daily driver for family meals, not a compromise appliance that handles things adequately but less well.
For a full breakdown of the Omni Plus cooking surfaces and PFAS-free verification, see the guide on whether the Instant Pot Omni Plus is PFAS free. For the full review covering daily use performance in detail, see the Instant Pot Omni Plus review. And for families considering a compact ceramic basket option alongside the Omni Plus for smaller daily cooks, see the guide on the Ninja AF150AMZ ceramic basket.