About the most decedent, rich cake you could ever want to eat. I came across it years ago, somewhere (I can't locate it again) and put it in my arsenal, and my boys request it EVERY YEAR for their birthdays for 5 years in a row. It's beyond belief!
For crust/bottom - Press in crust, 9x13 pan: graham cracker crumbs, 1/2 cup melted butter, 1/4 cup sugar, chopped pecans (if using).
For cake - Mix together cake mix, 1 cup boiling water, box strawberry jello, 1/2 cup oil, 4 eggs. Pour into pan over graham crust.
Filling - Beat 8 oz softened cream cheese, 1/2 cup sugar, 1 egg. Drop into cake mixture and swirl with a knife. Bake at 350 for 35-40 minutes. Pour one carton thawed frozen sweetened strawberries over baked cake while hot.
Frosting - Beat 1 can sweetened condensed milk, 8 oz softened cream cheese, 1/2 cup sugar together and fold in 8 oz cool whip. Frost after cake has cooled. Refrigerate.