Preheat oven to 375F and grease 9” round baking pan, set aside.
In a medium bowl, add flour, salt, and baking powder. Whisk with a fork to incorporate.
In a bowl of a stand mixer, add sugar, butter, and vanilla. Cream on medium-high until light and fluffy. About 3-4 minutes.
Add eggs, one at a time scraping the bowl after each addition. Add lemon zest if using it.
With the mixer on low, add milk in 2 additions alternating with the dry mix in 3 additions. Mix the batter nicely to incorporate everything together. Lastly, using a rubber spatula, gently mix in the blueberries.
Transfer the batter into the prepared pan. Sprinkle with turbinado sugar and some extra blueberries, if desired.
Bake for about 40 minutes or until the toothpick inserted comes out clean.
Let the cake rest in the pan for 10 minutes, then take it out of the pan and cool completely on a wire rack and serve.