Shake the coconut milk well, then pour into a clean bowl and whisk until smooth and lump-free.
Add tapioca or cornstarch and whisk again until fully dissolved for a thicker yogurt texture.
Open probiotic capsules and gently stir the powder into the coconut mixture until evenly incorporated.
Transfer to a clean glass jar, loosely cover with a cloth or partially closed lid, and let ferment at room temperature for 12–24 hours.
Taste and refrigerate once tangy and thickened, allowing it to chill fully into creamy, spoonable yogurt.