The Ninja FG551 Review is worth reading if you want more than a basic indoor grill. The Ninja Foodi Smart XL 6-in-1 Indoor Grill combines grilling, air frying, roasting, baking, broiling, and dehydrating in one countertop unit. It also has a smart thermometer, which is one of the features that makes this model different from a simple grill.
What caught my attention is how much this grill tries to solve at once. You get high-heat indoor grilling, crisp food, and guided meat cooking without needing several appliances. But there are trade-offs too. It is large, cleaning takes some effort, and the smoke-control system still needs proper use. Here is what I think matters most before buying one.
What Is the Ninja FG551?
The Ninja FG551 is an indoor electric grill and air fryer with six cooking functions. It is made for people who want grilled food at home without using an outdoor grill.
The six modes are Grill, Air Crisp, Bake, Roast, Broil, and Dehydrate. The unit is rated at 1,760 watts, so it is a serious countertop appliance rather than a small air fryer.
| Feature | Ninja FG551 detail |
| Cooking modes | Grill, Air Crisp, Bake, Roast, Broil, Dehydrate |
| Power | 1,760 watts |
| Main specialty | Indoor grilling and air frying |
| Smart feature | Foodi Smart Thermometer |
The Amazon listing for this ASIN currently identifies it as the Ninja FG551 Foodi Smart XL 6-in-1 Indoor Grill and Air Fryer with a 4-quart capacity. At the time I checked, Amazon showed 4.7 out of 5 stars from more than 15,000 ratings.
That review count is useful as a sign of long-term interest, but I would not treat the star score alone as proof that the grill will suit everyone.
What I Like About the Ninja FG551
The biggest appeal is simple: you do not have to buy an indoor grill and an air fryer as separate machines.
The FG551 gives you several cooking methods in one body. That makes more sense if you cook different types of food during the week. I can see the value for someone who wants steak one night, wings the next, and roasted vegetables after that.
| Cooking mode | Where it makes sense |
| Grill | Steak, chicken, burgers, vegetables |
| Air Crisp | Fries, wings, frozen foods |
| Roast | Meat and vegetables |
| Bake | Small baked foods and desserts |
| Broil | Fast browning and crisping |
| Dehydrate | Fruit, vegetables, and snacks |
The grill mode is the main reason to look at this model. Ninja designed it to create grill marks and grilled flavor indoors. The other modes make the appliance more useful when you are not in the mood for grilled food.
That combination is much more useful to me than having six modes that all feel nearly the same.
Does the Smart Thermometer Really Help?
This is one of the most useful parts of the Ninja FG551.
The Foodi Smart Thermometer plugs into the grill and measures the food’s internal temperature. You can use preset settings for different foods and doneness levels, or use manual settings. With the thermometer connected, the grill can stop the heating process when the selected internal temperature is reached.
That sounds small, but it solves a common cooking problem.
I have always found steak and chicken easier to cook when I can watch the internal temperature instead of guessing from time alone. A timer tells you how long the food has cooked. A thermometer tells you what is happening inside the food.
| Without the thermometer | With the smart thermometer |
| You mainly judge by time | You track internal temperature |
| More guesswork | More direct temperature control |
| Easy to overcook meat | Easier to stop at the chosen doneness |
There is one thing I would not misunderstand. The thermometer does not turn every cook into a perfect result. Food thickness, starting temperature, and placement still matter.
Still, for meat, I see this as one of the strongest reasons to consider the FG551.
How Good Is the Ninja FG551 for Indoor Grilling?
This is where the FG551 makes the most sense.
The grill uses high heat to give food grill marks and a seared surface. Ninja’s guide lists grill temperature levels that can reach 500°F, with some versions and settings allowing temperatures up to about 510°F.
The important thing is to use the grill as a grill, not expect it to behave exactly like a charcoal grill.
You will not get the same outdoor smoke or charcoal flavor. What you do get is a much easier way to cook grilled food indoors.
| Food | What I would watch |
| Steak | Use the thermometer and avoid guessing by time |
| Chicken | Check internal temperature before serving |
| Burgers | Leave enough space between pieces |
| Vegetables | Cut pieces to a similar size |
| Frozen foods | Air Crisp may make more sense than Grill |
One mistake I would avoid is overcrowding the grate. When food is packed together, hot air and heat cannot work as well around each piece. You may end up with less browning and more uneven cooking.
Give the food room when you can.
Does the Ninja FG551 Smoke?
This is probably one of the most important questions to answer honestly.
The FG551 is built for indoor cooking and has design features aimed at reducing smoke. But reduced smoke does not mean zero smoke.
The owner’s guide specifically warns that cooking at a hotter setting than recommended can produce smoke. It also says that using oils with higher smoke points can help reduce smoke compared with olive oil in some high-heat situations.
| Possible smoke trigger | Better habit |
| Too much oil | Use only what you need |
| Oil with a low smoke point | Choose a more suitable cooking oil |
| Grease buildup | Clean the unit after cooking |
| Dirty splatter shield | Clean it before the next use |
| Too much food | Cook in smaller batches |
The splatter shield matters more than it may seem. It sits under the hood and helps keep grease away from the heating element. Ninja says failing to use it can lead to oil buildup on the heating element and cause smoking.
So, if someone says an indoor grill should never make smoke, I would not rely on that expectation.
The Cleaning Lesson I Would Not Skip
Cleaning is one of those things that looks easy before you own a grill.
The FG551 has several removable parts, including the grill grate, crisper basket, cooking pot, and splatter shield. Most of these parts can go in the dishwasher, but the thermometer needs special care and should not go in the dishwasher. The main unit should not go in the dishwasher either.
The splatter shield deserves special attention.
Ninja recommends cleaning it after every use. If grease has baked onto it, soaking can help loosen the mess.
| Part | Cleaning approach |
| Grill grate | Dishwasher or hand wash |
| Crisper basket | Dishwasher, depending on included version |
| Cooking pot | Dishwasher |
| Splatter shield | Clean after use |
| Thermometer | Hand wash only |
| Main unit | Wipe clean; keep water away |
My biggest practical takeaway here is simple: do not put off cleaning the splatter shield.
Grease is much easier to deal with while it is fresh. Once it gets baked on, the job becomes annoying. That is true of almost every grill, but the enclosed design of this one makes regular cleaning even more important.
Is the Ninja FG551 Too Big for a Countertop?
For some kitchens, yes.
The FG551 is not the kind of appliance I would buy without first checking the counter space. It is a large countertop cooker, and you need room around it for normal use.
That matters because the best appliance is not very useful if you have to move it every time you cook.
| Kitchen situation | How I would look at the FG551 |
| Large open counter | Easy fit |
| Small kitchen | Measure first |
| Limited storage | Plan to leave it out |
| Shared counter space | May feel bulky |
| Dedicated cooking area | Better match |
This is one of the less exciting parts of a Ninja FG551 review, but it is important.
Do not only measure the appliance. Think about the space you need to open the hood, prepare food, remove hot parts, and clean everything afterward.
What About the 4-Quart Capacity?
The Amazon listing identifies this model with a 4-quart capacity.
That is useful for everyday meals, but I would not think of the 4-quart number as a promise that every meal will feed a large group in one batch.
The actual cooking space depends on the food and the cooking mode.
For example, a few thick steaks need more room than a basket full of small frozen foods. Chicken wings also need space if you want them to brown well.
| Cooking need | My practical approach |
| One or two steaks | Grill with space around them |
| Small family meal | Use the main cooking area |
| Large batch of wings | Expect more than one batch |
| Frozen snacks | Air Crisp works well for smaller loads |
| Mixed foods | Cook foods in separate batches |
The lesson is easy: capacity is not just about volume.
Food needs room to cook well. Filling every inch can save time at first but may hurt the result.
Common Ninja FG551 Mistakes I Would Avoid
A lot of problems with countertop grills are not really machine problems. They come from using the machine in a way it was not designed for.
Here are the mistakes I would put at the top of the list.
| Mistake | Better approach |
| Skipping preheat | Let the grill reach the needed heat |
| Overcrowding food | Leave room around pieces |
| Using too much oil | Use a light amount |
| Ignoring the thermometer | Use it for meat when useful |
| Forgetting the splatter shield | Keep it installed |
| Delaying cleanup | Clean grease before it hardens |
The owner information also recommends cleaning between repeated grilling batches and emptying fat or oil from the cooking pot when grilling more than two batches in a row. That helps reduce the chance of grease burning and creating smoke.
That is a detail I would keep in mind if you are cooking a big meal.
Ninja FG551: What Surprised Me Most
The biggest surprise is not the number of cooking modes.
It is how much the thermometer changes the cooking process.
Many countertop grills give you a temperature and a timer. You still have to guess when meat is ready. The FG551 takes a different approach. Once the thermometer is set up, you can cook based on internal temperature rather than relying only on time.
The second thing that stands out is the maintenance.
At first glance, the FG551 looks like a simple grill. In daily use, it is more like a small cooking system with several parts. That is not bad, but it means you need a cleaning routine.
| What looks simple | What you actually need to do |
| Indoor grilling | Manage oil and grease |
| Air frying | Avoid overloading |
| Smart thermometer | Clean it by hand |
| Smoke control | Keep the shield clean |
| Multiple cooking modes | Learn which mode fits each food |
That is why I would not judge this grill only by its feature list.
The real question is whether those features fit the way you cook.
Who Should Consider the Ninja FG551?
I think the FG551 makes the most sense for someone who wants indoor grilling but also wants more flexibility.
It is especially interesting if you cook meat often and like the idea of using a smart thermometer instead of guessing.
It also makes sense for people who want air frying and grilling in the same appliance.
| You may like it if… | Think twice if… |
| You want indoor grilling | Counter space is very limited |
| You cook steak or chicken often | You hate cleaning cooking parts |
| You want air frying too | You only need a basic air fryer |
| You like temperature control | You want outdoor charcoal flavor |
| You cook several types of food | You prefer very small appliances |
I would not buy the FG551 simply because it has six functions.
Buy it because at least two or three of those functions will become part of your normal cooking routine.
Is the Ninja FG551 Worth It?
Whether the Ninja FG551 is worth it depends on what you want from an indoor cooker.
If your main goal is indoor grilling, the high-heat grill function and smart thermometer make the FG551 a useful package. If you also air fry, roast, bake, broil, or dehydrate, the extra functions give the large countertop footprint more purpose.
But there are real compromises.
You need counter space. You need to clean it. You should not expect completely smoke-free cooking. And you should not expect one batch to handle every large family meal.
| Strong point | Trade-off |
| Smart thermometer | More parts to manage |
| Indoor grilling | Can still produce smoke |
| Six cooking modes | Larger countertop footprint |
| Dishwasher-safe accessories | Thermometer needs hand cleaning |
| High-heat cooking | Requires care with oils and grease |
The Amazon listing currently shows strong customer interest, with a 4.7-star rating from more than 15,000 ratings when checked. That is useful context, but I would still match the machine to your cooking habits rather than buying from the rating alone.
Final Thoughts on My Ninja FG551 Review
My biggest takeaway from researching the Ninja FG551 Review is that this is not just an indoor grill. The smart thermometer is a real part of the cooking experience, while the air-crisp and other modes make the appliance useful beyond steak night.
The main lesson is to keep expectations realistic. It takes space, it needs regular cleaning, and smoke control works best when you use the right oil, temperature, and cleaning routine. If those things fit your kitchen and cooking style, the FG551 is a much more versatile countertop cooker than its grill name alone suggests.
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