1box15.25 oz lemon cake mix (plus ingredients required on the box)
For the Lemon Filling:
1box3.4 oz instant lemon pudding mix
2cupscold milk
For the Topping:
1container8 oz whipped topping (like Cool Whip), thawed
1/4cuplemon zestoptional, for garnish
Sliced lemonsoptional, for decoration
Instructions
Prepare the Cake: Preheat your oven to 350°F (175°C). Grease a 9x13-inch baking dish. Prepare the lemon cake mix according to the package instructions. Pour the batter into the prepared baking dish and bake for 25-30 minutes, or until a toothpick inserted into the center comes out clean. Let the cake cool for 10 minutes.
Poke the Cake: Using the handle of a wooden spoon, poke holes all over the surface of the cake.
Make the Filling: In a medium bowl, whisk together the instant lemon pudding mix and cold milk until smooth. Let it sit for 2-3 minutes to thicken slightly.
Add the Filling: Pour the pudding mixture over the cake, spreading it evenly and ensuring it fills the holes. Refrigerate for 2 hours to allow the cake to set.
Top the Cake: Spread the thawed whipped topping evenly over the chilled cake. Garnish with lemon zest and sliced lemons, if desired.