Preheat your oven to 350°F (175°C) and line a 9x13-inch pan with parchment paper.

In a medium bowl, whisk together the all-purpose flour and a pinch of salt.

In a large bowl, cream together the unsalted butter and granulated sugar for about 3-4 minutes until fluffy.

Add the eggs one at a time to the butter-sugar mixture, mixing well after each addition.

Stir in the lemon zest, lemon juice, and vanilla extract.

Fold the flour mixture into the wet ingredients gently.

Pour the batter into the prepared pan and bake for about 25-30 minutes.

Allow the brownies to cool completely in the pan on a wire rack.

Prepare the glaze by whisking together the powdered sugar and lemon juice.

Pour the glaze over the cooled brownies, then allow it to set.

Slice into squares and serve.