Get out a jelly roll pan and line it with parchment paper. This will make clean-up a breeze.
Preheat oven to 350-degrees. In a large bowl, beat cake mix, butter, and one egg until mixture is crumbly. Stir in saltine crumbs. Reserving two cups of the crumb mixture, press remaining crumbs on bottom of the parchment-lined pan. Use your fingers to mush it as evenly as possible.
Bake 15 to 20 minutes or until golden.
With wire whisk, beat 2 egg yolks, sweetened condensed milk and lemon juice. Spread over prepared crust using a spatula or the back of a spoon. Evenly top with reserved crumb mixture.
Bake 25 minutes longer or until set and top is golden. Let cool. Refrigerate within 2 hours. Cut into bars. Store covered in fridge.
OM NOM NOM!