Preheat your oven to 350.
Whisk together the 2 eggs, oil, and vanilla extract (if using).
Add the wet mixture with cake mix and stir until dough forms. Note: this will probably be a fairly stiff dough so use a large sturdy bowl.
Use two tablespoons or a cookie scoop to create 1-inch balls of dough. If it’s too sticky or difficult to manage, chill the dough for 30 minutes before baking.
Place on ungreased cookie sheet leaving about 2 inches between cookies. Tip: line your cookie sheets with parchment paper or a silicone mat for easy cookie release and cleanup.
Bake 9-10 minutes, until set.
Remove from oven and wait for about 5 minutes before removing the cookings to a cooling rack. The cookies may be a little puffy coming out of the oven and then will collapse while cooling.