In a large mixing bowl, combine ½ cup of chia seeds with 2 cups of your preferred milk. Whisk until well blended, then let sit at room temperature for about 4 hours or overnight in the refrigerator.

In another bowl, mix 1 cup of Greek yogurt with ½ cup of cooled brewed coffee, ¼ cup of cocoa powder, 1 teaspoon of vanilla extract, and 1 tablespoon of sweetener if desired. Whisk until smooth.

In serving cups or jars, spoon a layer of the chia pudding, then a layer of the coffee yogurt mixture. Alternate layers until desired height is reached.

Dust the top with cocoa powder or add toppings like chocolate shavings. Chill for at least an hour before serving to meld flavors.