Preheat your oven to 350 degrees Fahrenheit or 175 degrees Celsius.

Grab an 8x8-inch baking pan and line it with parchment paper.

In a large mixing bowl, combine the melted butter and sugar. Using a whisk, whisk the mixture until combined.

Whisk in the eggs one at a time and mix until combined.

Add vanilla essence and lemon juice to the mix. Whisk until the mixture becomes lighter in color.

Add all-purpose flour, baking powder, and salt to the wet mixture.

Use a spatula to fold the ingredients until just combined with no streaks remaining. Be careful not to overmix.

Pour the batter into the prepared baking pan and smooth out the top with a spatula.

Bake the lemon brownies in the preheated oven for about 20-25 minutes or until a toothpick inserted in the center comes out mostly clean.

Remove the brownies from the oven and let them cool in the pan for 15 minutes.

Transfer the brownies to a wire rack or a board to cool.

While the brownies cool, whisk powdered sugar and lemon juice in a small bowl until smooth.

The glaze should be thick, but pourable. Adjust with more powdered sugar or lemon juice as needed.

Once the brownies have cooled completely, pour the prepared lemon glaze evenly over the top.

Spread evenly and let it set for 15-20 minutes.

Slice into squares or bars and enjoy deliciously soft and refreshing lemon brownies with a sweet and tangy glaze!