Preheat the oven to 350ºF.
Lightly butter and flour a 9-inch springform pan; set aside.
In a mixing bowl, combine 1 ¾ cups flour, baking powder and salt; whisk well and set aside.
In the bowl of a stand mixer, add ½ cup melted butter and ¾ cup granulated sugar. With the paddle attachment, process until creamy before adding egg and vanilla; mix until combined.
Add half of the dry ingredients and process until blended. Pour in ¼ cup milk and continue mixing until smooth. Repeat with the remaining dry ingredients and ¼ cup milk; process until the batter is smooth.
In a medium bowl, add blueberries, ¼ cup sugar and lemon zest; stir to combine.
Add the blueberry mixture to the batter including any liquid. Gently fold in with a spatula until evenly combined.
Pour the mixture into the prepared pan, level it and transfer to the preheated oven; bake for 50 to 55 minutes or until a cake tester inserted in the center comes out clean.
Transfer to a wire rack to cool before unmolding. Serve as is or drizzle on some crème Anglaise.