Whisk baking powder, salt, sugar, and 3 cups (375 g) flour in a medium bowl to combine. Open can of unstirred coconut milk and scoop coconut cream layer off the top into a small bowl. Mix 1 cup remaining coconut milk and 1 Tbsp. coconut cream into dry ingredients by raking with your fingers, then knead, adding more coconut milk by the teaspoonful as needed, until a soft and smooth dough forms. Cover and let sit 30 minutes.