Increase the amount of coconut oil used for coating: You can try increasing the amount of coconut oil used to coat the cashews. This will help the spices adhere better to the surface of the cashews. You may also want to try a different type of oil that has better adhesion properties, such as grapeseed oil.
Use a binding agent: Arabic gum or acacia gum can be used as a binding agent to improve the adhesion of the spice coating to the cashews. These are natural and edible gums that are commonly used in food production as stabilizers and thickeners. They can also help to keep the spices from settling to the bottom of the package. You can try adding a small amount of gum to the coconut oil and spice mixture before coating the cashews.
Mix the spices and oil thoroughly: Ensure that the spices are evenly mixed with the oil before coating the cashews. This will help to ensure that the spices are distributed evenly and adhere well to the surface of the cashews.
Allow the cashews to cool before coating: Ensure that the cashews have cooled down completely before coating with the spice mixture. This will help the spices to adhere better to the surface of the cashews.