Mix the base: In a bowl or jar, whisk together the yogurt, milk, sweetener, vanilla, and salt until smooth. Break up any yogurt lumps so it’s evenly blended.
Add chia seeds: Stir in the chia seeds, making sure they’re well dispersed.
Scrape the sides and bottom so no seeds clump together.
Rest and stir again: Let the mixture sit for 10 minutes, then give it another good stir. This second stir helps prevent settling and clumps.
Chill: Cover and refrigerate for at least 2 hours, or overnight for best texture. The pudding will thicken as the chia seeds absorb liquid.
Adjust: Check consistency.
If it’s too thick, stir in a splash of milk. If it’s too thin, add 1 teaspoon more chia seeds and chill another 20–30 minutes.
Top and serve: Add fruit, nuts, or your favorite toppings right before eating. Enjoy cold.