1Heat oven to 350°F. Spray 36 mini muffin cups with cooking spray. In medium bowl, mix chocolate chips, pecans, brown sugar, vanilla, salt and 1 of the eggs until blended. Cover and refrigerate.
2In large bowl, stir cookie mix, butter and remaining egg until soft dough forms. Shape dough into 36 (1-inch) balls; place in muffin cups. Bake 8 minutes or until edges are set.
3Spoon chilled chocolate chip mixture evenly over baby cakes. Bake 8 minutes longer. Cool 5 minutes; remove from pans to cooling racks. Cool completely. Sprinkle with powdered sugar.