Refrigerate the canned coconut milk (optional) to separate the cream from the water at the bottom of the can.
Combine the coconut milk or cream with the probiotic in a sterilized glass jar.
Place the sealed jar in the oven with the light on (do not turn the oven on) for up to 24 hours to incubate.
Enjoy the coconut milk yogurt with various toppings or mix-ins like berries, nuts, or applesauce.