Prep your lemon. Roll the lemon on the counter to release more juice.
Zest a little before cutting if you want extra lemon flavor, then squeeze out the juice.
Load the blender. Add milk first, then yogurt, lemon juice (and zest if using), vanilla, salt, and honey. Top with frozen blueberries and any add-ins.
Blend until smooth. Start on low to break things up, then move to high for 30–45 seconds. If it’s too thick, add a splash more milk.
If too thin, toss in a few more frozen berries.
Taste and adjust. Add more lemon for brightness, or a touch more honey if you like it sweeter. A pinch more salt can make the flavors pop.
Serve right away. Pour into a chilled glass. Garnish with lemon zest or a few fresh blueberries if you’re feeling fancy.