In medium bowl, mix graham cracker crumbs, flour, baking powder, baking soda and salt; set aside. In large bowl, beat oil and brown sugar with electric mixer on medium speed until combined, about 1 minute. Beat in eggs, one at a time, scraping side of bowl between additions. Beat in milk and vanilla. Add graham cracker mixture; stir just until combined (batter will be thin). Pour into loaf pan.