In a small bowl, whisk together the raw cacao powder and cornstarch.
In a saucepan, combine the oat milk and the cacao-cornstarch mixture. Whisk until smooth and the cornstarch is fully dissolved.
Place the saucepan over medium heat. Cook, stirring constantly, until the mixture begins to thicken. This should take about 5-7 minutes.
Once thickened, remove from heat and stir in the pure maple syrup, vanilla extract, and a pinch of pink salt.
Transfer the pudding to serving dishes and let it cool to room temperature. For a thicker consistency, chill in the refrigerator for at least an hour before serving.
Top with desired toppings, such as berries or slivered almonds. Enjoy!