Start by melting the butter. The amount depends on how many Cheerios you're making, but a good rule of thumb is about 1-2 tablespoons of butter for every cup of Cheerios.
In a large bowl, toss the Cheerios with the melted butter until they are evenly coated.
If you’re making savory Cheerios, sprinkle with a pinch of salt, or if you prefer sweet, a mix of cinnamon and sugar. You can also experiment with other seasonings like garlic powder, parmesan, or paprika.
Preheat your air fryer to 350°F (175°C). This may take a few minutes depending on your air fryer model.
Once preheated, spread the Cheerios in a single layer in the air fryer basket. If you have a lot, you may need to work in batches to avoid overcrowding.
Cook the Cheerios for about 4-6 minutes. Shake the basket or stir the Cheerios halfway through to ensure even cooking.
Keep an eye on them, as cooking times can vary depending on your air fryer model. The Cheerios should be golden brown and crispy when done.
Once cooked, let the Cheerios cool for a few minutes. They will crisp up further as they cool.
Serve the air-fried Cheerios as a snack, or use them as a crunchy topping for yogurt, ice cream, or salads.