In a medium bowl, combine all ingredients. Mix until all nuts are well coated.
Transfer all the coated nuts into the basket of the air fryer. Cook for 5 minutes. Shake the basket.
Continue air frying for an additional 3 to 5 minutes, until walnuts are golden and look sticky. Don’t overcook, as the sugar will burn.
Notes
Toasting Walnuts in Oven
Add all ingredients to a mixing bowl and toss until nuts are all coated.
Line your baking sheet with parchment paper or a silicone baking mat.
Spread nuts into a single layer on the pan.
Bake in oven at 350°F for 8 to 10 minutes. Once you hit the 5-minute mark, check on them often. Toasted walnuts can go from perfect to burnt in under a minute!
Don’t forget to let them cool. Don’t worry if they seem soft, they will continue to crisp as they cool down.