Add cake mix, 1 egg and oil to a bowl and mix together until it's a crumbly consistency. Reserve ½ cup of the mixture. Pat the remaining mixture into an ungreased 9-inch square baking pan. Bake for 15 minutes. Remove from oven.
In another bowl, beat cream cheese, lemon juice, sugar and 1 egg until smooth. Spread in the pan over the baked layer. Sprinkle with reserved crumbs.
Bake for 20 minutes. Let cool before cutting into squares.
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Notes
If you can't find yellow cake mix, you could substitute white cake mix in its place.