Mix Wet Ingredients: In a medium bowl, pour the milk and whisk in sweetener, vanilla, and a pinch of salt.
Add Cocoa Powder: Sift in the cocoa powder to avoid lumps and whisk until smooth.
Add Chia Seeds: Stir in chia seeds thoroughly, ensuring they are evenly dispersed.
First Chill: Place the mixture in the refrigerator. After 10–15 minutes, stir again to prevent the seeds from sinking to the bottom.
Full Chill: Refrigerate for at least 3 hours or overnight until the pudding thickens.
Prepare Berries: Wash and cut berries if needed. Toss with lemon juice and optional sweetener.
Assemble: Spoon the pudding into serving cups and top with the fresh berry mixture.
Serve Cold: Enjoy straight from the fridge for best texture.