Mix the base: In a jar or bowl, whisk together 1 cup milk, 1–2 teaspoons sweetener, 1/2 teaspoon vanilla extract, and a small pinch of salt until smooth.
Add chia seeds: Stir in 3 tablespoons chia seeds, whisking well to break up any clumps.
Let it sit for 2–3 minutes.
Stir again: After those few minutes, whisk once more. This helps prevent the seeds from sinking and clumping.
Chill: Cover and refrigerate for at least 2 hours, ideally overnight, until thick and pudding-like.
Stir and adjust: Give it a final stir. If it’s too thick, add a splash of milk.
If it’s too thin, stir in 1 teaspoon more chia and chill 15–20 minutes.
Serve: Top with fresh berries, sliced banana, nuts, coconut flakes, or a spoonful of yogurt or nut butter.