Preheat the oven to 350 degrees.
Lightly grease and flour a large Bundt pan.
Mix up cake mix according to package directions. I used Duncan Hines Lemon Supreme Cake Mix. It required 3 large eggs, 1 cup water, and 1/3 cup vegetable oil.
Add the pudding mix and the lemon juice to the other cake mix ingredients.
Blend together and pour into a prepared pan.
Bake as directed on package. I baked my cake for 30 minutes.
Test to see if it is done by inserting a toothpick in the center of the cake.
Let the cake cool for 15 minutes.
Invert cake onto a serving plate.
Whisk together the sugar, milk, and lemon juice.
Drizzle over warm cake.