1 To Make Burnt Sugar Mixture: Melt 1 cup white sugar in a pan till medium brown. Slowly stir in 1/2 cup boiling water.
2 Preheat oven to 325 degrees (165 degrees C).
3 Sift together into mixing bowl the flour, 1 1/2 cups white sugar, baking powder, and salt. Form a well in the dry ingredients and add the vegetable oil, egg yolks, burnt sugar mixture, cold water and vanilla. Beat with wooden spoon until smooth.
4 Beat egg whites and cream of tartar in large bowl until they hold very stiff peaks. Pour egg yolk mixture in a thin stream over egg whites. Fold in gently. Pour batter into an ungreased tube pan.
5 Bake at 325 degrees F (165 degrees C) for 65 to 70 minutes.