Preheat the oven according to the cake mix package instructions.

In a mixing bowl, combine the lemon cake mix, water, vegetable oil, and eggs. Mix until well combined.

Stir in the lemon zest and lemon juice.

Pour the batter into a greased cake pan and bake according to package directions or until a toothpick comes out clean.

Let the cake cool before glazing.

For the glaze, mix powdered sugar with 2 tablespoons of lemon juice until smooth and pour over the cooled cake.