Add the cashews and 1 cup unsweetened vanilla almond milk (or milk of choice) to a high-powered blender and blend until the cashews are broken down and the mixture is smooth, about 60–90 seconds.
Add the frozen banana coins, vanilla extract, ground turmeric, ground cinnamon, ground ginger, ground nutmeg, salt, honey, and ice cubes to the blender.
Blend until completely smooth and creamy, about 60–90 seconds, stopping to scrape the sides if needed so the honey does not settle at the bottom.
Check for any chunks and blend briefly again if necessary, taking care not to over-blend to avoid thinning the smoothie.
Pour into two glasses and optionally sprinkle a little cinnamon on top. Serve immediately.