
Ninja DG551 Foodi Smart XL 6-in-1 Indoor Grill
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Our take on the Ninja DG551 Foodi Smart XL 6-in-1 Indoor Grill
The Ninja Foodi Smart XL DG551 is a countertop indoor grill and air fryer that uses a 500°F grill grate plus cyclonic hot air to char food with grill marks. Its standout feature is the Smart Cook System: a food thermometer with four protein settings and nine doneness levels, so you can cook to rare or well-done without guessing. It also air crisps, roasts, bakes, broils and dehydrates, and a smoke-control system of splatter shield and cool-air zone keeps smoke down. It suits people who want grilled food year-round without an outdoor grill, and it competes with other indoor grills on the thermometer and the six functions rather than on size.
- Built-in Smart Thermometer with protein and doneness settings
- 500°F grate plus cyclonic air for real char marks
- Six functions: grill, air crisp, roast, bake, broil, dehydrate
- Smoke-control system with splatter shield and cool-air zone
- Cooks from frozen to charred in under 25 minutes
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What reviewers say
Owners like the thermometer-guided results and the char marks from a countertop unit, and many use it as a year-round grill. Complaints center on smoke with fatty foods, the counter space it takes, and cleaning the grate and splatter shield.
- Thermometer accuracyPraisedOwners say the Smart Thermometer hits the doneness they pick for steak and chicken.
- SmokeMixedThe smoke-control system helps, but fatty foods still set off smoke and sometimes a detector.
- Grill marksPraisedReviewers say the 500°F grate leaves visible char marks and grill flavor indoors.
Questions and answers
- How does the Smart Thermometer work?
- You insert the probe, pick one of four proteins and a doneness level from rare to well-done, and the grill stops at your target. It removes the need to guess cooking times for steak, chicken and pork.
- Does it really produce less smoke?
- The splatter shield, temperature-controlled grate and cool-air zone cut smoke compared with open grilling. Fatty foods can still smoke, so use the recommended practices and ventilation.
- What can it do besides grill?
- It air crisps, roasts, bakes, broils and dehydrates across a wide temperature range. The included 4-qt crisper basket is for air-frying foods like fries and wings.
- Can I cook from frozen?
- Yes. Ninja says frozen foods go to char-grilled in under 25 minutes, which skips defrosting for items like chicken and burgers.
- How much counter space does it need?
- It is a large countertop appliance, so plan on keeping it out rather than storing it between uses. Measure your space before buying.
- Is the grill grate dishwasher safe?
- The ceramic-coated grate, crisper basket and cooking pot are removable for cleaning. Check the manual for which parts are dishwasher safe, since the coating needs care.

















