Choose your container. A jar with a lid or a small bowl works. Clear jars make it easy to check consistency and layer toppings.
Measure and mix. Add 1 cup milk, 3 tablespoons chia seeds, 1–2 teaspoons sweetener, 1/2 teaspoon vanilla, and a small pinch of salt. Stir well.
Stir again after 5–10 minutes. The seeds start to clump as they hydrate.
A second stir breaks up lumps and ensures an even texture.
Cover and chill for at least 2 hours or overnight. Overnight gives the best gel and flavor. The pudding should be thick and spoonable.
Adjust thickness. If it’s too thick, add a splash of milk and stir. If it’s too thin, stir in 1 extra teaspoon of chia and chill 15–30 minutes more.
Add toppings before serving. Keep toppings fresh by adding them right before you eat: fruit, nuts, nut butter, granola, yogurt, or a dusting of cinnamon.