Preheat the oven to 350°F (175°C). Grease and flour a 9-inch round cake pan.

In a mixing bowl, combine the lemon cake mix, water, vegetable oil, eggs, lemon zest, and lemon juice.

Mix with a whisk until smooth and well combined.

Pour the batter into the prepared cake pan.

Bake in the preheated oven for 30 minutes or until a toothpick inserted in the center comes out clean.

Allow the cake to cool in the pan for 10 minutes, then transfer to a wire rack to cool completely.

In a small bowl, whisk together the powdered sugar and lemon juice until smooth.

Drizzle the glaze over the cooled cake before serving.