Making Lemon Brownies is simple. Just follow these clear instructions:

1. Preheat the Oven: Preheat your oven to 350°F (175°C). Grease a 9×13 inch baking dish or line it with parchment paper for easy removal.
2. Mix Wet Ingredients: In a large bowl, combine the melted butter and granulated sugar. Mix until well combined. Add the eggs one at a time, stirring after each addition. Then mix in the vanilla extract, lemon zest, and lemon juice.
3. Combine Dry Ingredients: In another bowl, whisk together the flour, baking powder, and salt until evenly combined.
4. Combine Mixtures: Gradually add the dry mixture to the wet mixture, stirring until just combined. Be careful not to overmix; a few lumps are okay.
5. Pour into Baking Dish: Pour the batter into the prepared baking dish, spreading it evenly.
6. Bake: Place the dish in the preheated oven and bake for 25-30 minutes or until a toothpick inserted into the center comes out clean.
7. Cool: Remove from the oven, and let the brownies cool in the baking dish on a wire rack for about 15-20 minutes.
8. Prepare Lemon Glaze: While brownies are cooling, mix the powdered sugar and lemon juice in a small bowl until smooth.
9. Glaze the Brownies: Once the brownies are cool, drizzle the lemon glaze on top, ensuring an even coating. Optionally, sprinkle with lemon zest for added flair.
10. Slice and Serve: Once the glaze is set, slice into squares and serve.

These steps will guide you effortlessly through the process of creating your Lemon Brownies.