Put all ingredients into a blender and blend until creamy and smooth. Put in the fridge to get cold or serve over ice.
Add brandy or rum for an alcohol treat. Top with whipped cream if desired.
Serve!
Notes
If you are not using a high speed blender, you can soak the cashews overnight, boil them for 30 minutes or grind the dry cashews into a fine powder using a coffee grinder (do not soak them for this method).
I like my eggnog with extra flavors and spices, reduce the spices for a more mild flavor.