Preheat your oven to 350°F (175°C) and grease a 9x13 inch baking pan.
In a large bowl, whisk together the cake mix and lemon pudding powder.
Add the lemonade, vegetable oil, and eggs. Beat until smooth—don’t be afraid to dance a little while you mix.
Pour the batter into the prepared pan and smooth out the top.
Bake for 25–30 minutes, or until a toothpick inserted in the center comes out clean.
Let it cool completely. Resist the urge to poke at it.
Frost if you’d like, or serve plain with a dusting of powdered sugar. Both are winners.