The Ninja 4-in-1 Cooking System performs four functions: it roasts and bakes, sears, makes one-pot meals and slow cooks. Contact heat from the bottom of the machine, direct heat from the sides, and steam allow for even heating and healthier meals.
Food is roasted by turning the functional dial to oven mode and selecting the desired temperature. Liquid needs to be added to the bottom of the pot every 10 minutes for steam to cook the food properly. The stove-top function sears meat before roasting and reheats food using the low, medium and high settings. Baked goods are prepared in the same manner and require less fat than when baking with a traditional oven.
One-pot meals are prepared by placing all ingredients in one pot and turning the functional dial to oven mode. One-pot meals can be made layered by layering vegetables on top of protein on the rack and adding a starch to the pot with water. Most meals finish cooking in 30 minutes.
The system functions as a slow cooker that slowly tenderizes meat in up to one day. The slow cooker option has three settings: high, low and buffet. The high setting cooks food twice as fast as the low setting, and buffet mode keeps food warm for up to 12 hours.