Pour mashed sweet potato mixture into a 9. Fry them, stirring occasionally, to get some color on them. The Best Recipes To Try In A Ninja Foodi Forkly in 2020 Stir in the brown sugar, butter, vanilla and cinnamon , mash with your fork until smooth. How to cook sweet potato fries in ninja foodi . After cooking for 10 minutes, open the “air crisp” lid and flip the sweet potato fries. Another useful trick i found for this recipe: I use a 6.5 quart ninja foodi for air frying. Toss the sweet potato fries in 1 tablespoon of olive oil. Not only are these sweet potato fries homemade, but they are crispy and delicious too. Carefully shake the basket every 5 minutes. Ideal for a quick ninja foodi lunch or dinner. Add 1 tablespoon of oil, spread evenly. Cut potatoes in to evenly sized chips approx 1cm thick and add to the basket of your ninja foodi air fryer. This will help ensure they come out nice and crispy. You will need to cut sweet potatoes with a special frie...