Preheat oven to 400 degrees.
Spray muffin pan with cooking spray.
Spoon the flour, granulated sugar, salt, baking powder and baking soda into a large bowl and whip with whisk.
Add blueberries and 2 teaspoons of the lemon rind to the bowl and mix in gently.
In a separate medium bowl, combine the buttermilk, butter, 1 tsp lemon juice and the egg mix together.
Now fold the buttermilk mixture into the flour mixture and mix just until moist.
Spoon the batter equally into 12 muffin cups.
Bake the muffins 20 minutes or until golden brown. Start checking after 15 minutes if your oven burns hot
Remove the muffins from the pan right away and let cool on a wire rack or on parchment paper.
Make the drizzle by combining the powdered sugar and the remaining lemon rind and lemon juice in a small bowl. Stir until smooth
Drizzle the glaze evenly over the cooled muffins.
Enjoy!