Prep Time: 25 mins
Cool Time: 2 hrs

Ingredients

1 (15.25-ounce) box yellow cake mix, plus ingredients on cake box
2 (14-ounce) cans sweetened condensed milk
1/2 cup fresh lemon juice
1 (8-ounce) container frozen whipped topping, thawed

Instructions

Prepare cake according to package instructions in a 9-inch-by-13-inch baking dish. Allow cake to cool 20 minutes. Meanwhile in a medium bowl, use a whisk to combine sweetened condensed milk and lemon juice. Allow to thicken slightly. Use the handle of a wooden spoon to poke holes about halfway into the cake about 1-inch apart. Pour half the lemon mixture over holes in the cake. Gently spread over cake, working back and forth to fill holes. (Some filling will remain on top). In another medium bowl, fold remaining lemon mixture into thawed whipped topping. Spread evenly over cake. Cover and refrigerate at least 2 hours before serving.