Mix the yogurt base: In a bowl, whisk Greek yogurt with protein powder, sweetener, vanilla, and a tiny pinch of salt.
Adjust sweetness to taste. If it feels too thick, thin with a splash of milk or water.
Prep the fruit: Rinse and pat berries dry. Slice strawberries if using.
Dry fruit helps keep layers tidy and the granola crunchy.
Layer the jars: Add 2–3 spoonfuls of the yogurt mixture to each jar. Sprinkle a few chia seeds if using. Add a layer of berries.
Add the crunch: Sprinkle a small handful of granola and a few chopped nuts or cacao nibs.
Repeat the layers: Add another layer of yogurt, more berries, then a final light sprinkle of granola.
Drizzle a bit of nut butter on top and dust with cinnamon if you like.
Seal and chill: Screw on the lids and refrigerate for at least 30 minutes to let flavors blend. They’re best within 3–4 days.
Serve: Enjoy cold straight from the jar. If the granola has softened, add a fresh pinch on top for crunch.