I had this at church when I visited Gonzales Ward and had to get the recipe from one of the ladies who swore it was so easy to make.
1 box yellow cake mix (butter recipe is my fav)
1 small box of jello (your flavor of choice), make according to directions on box
1 container of cool whip
1 box instant pudding (I guess vanilla), make according to directions on box
Make yellow cake per instructions on box in 9 x 13 pan.. Once out of oven and still warm, poke holes in cake and pour jello mixture on top of cake. Spread pudding on top of cake, refrigerate for a couple of hours. When you refrigerate the cake the JELLO will set up and form in those holes that were poked in the cake. Top with Cool whip before serving.
*I hope I got everything right. I haven't made it yet, so I'll let yall know when I do. Just wanted to share and put on this blog before I lost the sheet of paper I scribbled it on. :)