Add the Greek yogurt to a medium mixing bowl along with the vanilla extract, cinnamon, sea salt, fresh lemon zest, and the optional honey or maple syrup if you’d like a slightly sweeter flavor. Stir everything slowly at first so the cinnamon and lemon zest blend evenly into the yogurt. After a few seconds, the mixture should become smooth, creamy, and lightly fragrant with warm vanilla and citrus notes. If your yogurt feels very thick straight from the fridge, let it sit at room temperature for a minute or two before mixing for an easier, silkier texture.

Continue stirring the yogurt mixture until there are no streaks of cinnamon or sweetener remaining. The texture should look fluffy, glossy, and evenly combined. Taste the mixture at this stage and adjust sweetness if needed. Some blueberries are naturally sweeter than others, so you may prefer adding a tiny extra drizzle of honey or maple syrup depending on your taste.

Sprinkle the chia seeds evenly over the yogurt mixture and stir thoroughly so they don’t clump together at the bottom of the bowl. The chia seeds will begin absorbing moisture almost immediately, helping create that thick, mousse-like fluff texture. Make sure they are fully distributed throughout the yogurt for the best consistency.

Let the mixture rest for about 3–5 minutes so the chia seeds can naturally thicken everything. During this time, the yogurt transforms from a regular creamy mixture into a richer, fluffier texture that feels much more satisfying. If you prefer an even thicker consistency, allow it to sit for a few extra minutes before adding the blueberries.

Gently fold in the fresh blueberries using a spoon or silicone spatula. Try not to stir too aggressively because the berries can burst too much and make the mixture watery. A few broken blueberries are perfectly fine and actually create beautiful natural purple swirls throughout the fluff, but keeping most of them intact gives the best texture and presentation.

Sprinkle crushed walnuts or almonds over the top if desired. The crunchy nuts add contrast to the soft creamy yogurt and make the snack feel even more satisfying. For extra flavor, you can also add a light pinch of cinnamon or a little extra lemon zest right before serving.

Serve the blueberry yogurt fluff immediately if you prefer a softer, creamier texture. For a thicker and colder mousse-like consistency, place the bowl in the refrigerator for about 10–15 minutes before eating. Chilling allows the chia seeds to continue thickening the mixture while the flavors blend together even more beautifully.