In a small saucepan, whisk together the milk, ground turmeric, cinnamon, ginger, black pepper, and coconut oil. If you are using the optional cardamom or nutmeg, add them now.
Place the saucepan over medium-low heat. Heat the mixture, whisking frequently, until it is warm but not boiling.
Remove the saucepan from the heat, stir in your sweetener of choice and the optional vanilla extract. Taste and adjust the sweetness if needed before serving in a mug.