Preheat oven to 350°. In a large bowl, mix brown sugar and baking mix. In another bowl, whisk eggs, oil and vanilla until blended. Add to sugar mixture; stir just until moistened. Fold in pecans and coconut.
Transfer to a greased 13x9-in. baking pan. Bake 30-35 minutes or until browned and a toothpick inserted in center comes out with moist crumbs. Cool completely in pan on a wire rack.