Add the walnuts, pecans, almonds, pumpkin, and sunflower seeds to a bowl. Mix to combine. Set it aside.
Step 2
Melt the butter in your microwave or on a stovetop. Roughly chop the rosemary. Add the melted butter, rosemary, cayenne pepper, and sweetener to a separate bowl. Mix well to combine.
Step 3
Pour the prepared butter mixture over the nuts. Mix well with a spoon or your hands. The nuts should be thoroughly coated with the butter mixture.
Step 4
Line the basket of your air fryer with parchment paper. Add the prepared nuts in a single layer. If your air fryer is smaller, you can roast the nuts in batches. Roast for 20 minutes at 155°C (310°F).
Step 5
When done, remove the nuts from your air fryer. Cool the nuts to room temperature and serve immediately or store them for later. Enjoy!