The Seasoning Won't Stick To Your Spiced Nuts Because Of One Missing Ingredient - Tasting Table
Briefly

Using egg whites as an adhesive ensures that spices stick to the nuts during roasting, enhancing flavor and preventing waste from falling off.
Whipping egg whites until foamy is crucial; any yolk will introduce fat, making it difficult to achieve the desired texture necessary for coating.
For every three to four cups of nuts, one large egg white suffices, but a tablespoon of water can help stretch it further if needed.
If avoiding eggs, consider using neutral oils like extra virgin olive oil, or even store-bought egg whites, offering versatile alternatives for spice adhesion.
Read at Tasting Table
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