Lightly spoon flour into dry measuring cups; level with a knife. Combine flour, 1 cup sugar, baking powder, and salt in a large bowl. Combine oil, vanilla, and eggs; add to flour mixture, stirring until well-blended (dough will be dry and crumbly). Turn dough onto a lightly floured surface; knead lightly 7 to 8 times. Divide dough in half. Shape each portion into an 8-inch-long roll. Place rolls 6 inches apart on a baking sheet coated with cooking spray, and flatten each roll to 1-inch thickness. Combine 2 tablespoons sugar and cinnamon. Gently brush tops of rolls with egg white, and sprinkle with the cinnamon mixture.
Bake at 350 degrees for 30 minutes. Remove rolls from baking sheet; cool 10 minutes on wire rack. Cut each roll diagonally into 15 (1/2 inch) slices. Place the slices, cut side down, on baking sheet. Reduce oven temperature to 325; bake 10 minutes. Turn cookies over and bake an additional 10 minutes (the cookies will be slightly soft in center but will harden as they cool). Remove from baking sheet; cool completely on wire rack.
Yield: 2 1/2 dozen
serving size: 1 biscotti 84 cal, 1.2 g fat, 1.9 g pro, 16.5 g carb, 22 mg chol, 61 mg sod.