Preheat the oven to 350°F and lightly grease the cookie sheet or line it with parchment paper.
Beat eggs in a large bowl until foamy. Ad oil and brown sugar; beat until light and frothy. Blend in baking powder, vanilla, baking soda, and salt. Mix in flour until dough is smooth. Stir in chocolate chunks.
Shape the dough into walnut-sized balls (or drop). Place 2 inches apart on cookie sheet(s).
Bake 10-12 minutes or until lightly browned. Removed from cookie sheets to wire racks for cooling.