Preheat the oven to 350°F (175°C). Grease and flour a 9×13 inch baking pan.
In a large mixing bowl, combine the lemon cake mix, water, vegetable oil, and eggs.
Add the lemon zest to the batter and mix with an electric mixer on medium speed for 2 minutes until smooth.
Pour the batter evenly into the prepared baking pan.
Bake in the preheated oven for 28 to 32 minutes or until a toothpick inserted into the center comes out clean.
Remove the cake from the oven and allow it to cool completely in the pan on a wire rack.
In a small bowl, whisk together the powdered sugar and fresh lemon juice until smooth to create a glaze.
Once the cake is cooled, drizzle the lemon glaze evenly over the top.
Allow the glaze to set for 10 minutes before slicing and serving.