In a high-speed blender at high speed, blend about half the coconut milk (ignore the quantity below - it's a technical issue I can't fix), sweetener, chia seeds, vanilla and salt for about 1 minute until totally smooth.
1 14- ounce (1 3/4 cups or 400 ml) full-fat canned coconut milk, 37 grams xylitol, 28 grams erythritol, 1/8 teaspoon + 1/32 teaspoon stevia, 1/4 cup (50 grams) whole chia seeds, 1 teaspoon vanilla extract, 3/8 teaspoon salt