Preheat griddle to 375°F (190°C).
Whisk together flour, lemon zest, sugar, baking powder, and salt.
In another bowl, whisk together milk, eggs, and melted butter.
Pour wet ingredients into dry ingredients and mix only until all ingredients are wet.
Fold in blueberries.
Spray griddle with cooking spray or brush it with vegetable oil.
Spoon batter using ⅓ cup measure onto griddle and cook until bubbles form and the sides dry out, about 2-3 minutes.
Flip gently and cook through, about 1-2 minutes.
Repeat as necessary until all batter is used.