Preheat oven to 350 degrees.
Line a 15 ½ x 10 ½ inch jelly roll pan with aluminum foil;generously grease foil.
Beat egg whites until foamy; gradually adding granulated sugar and whip to soft peaks. Set aside.
Beat egg yolks with vanilla. Add brown sugar and molasses and continue whipping until slightly thickened.
Combine dry ingredients. Add to egg-yolk mixture. Fold gently into egg whites.
Spread evenly in pan. Bake for 10 minutes or until top springs back when lightly touched.
Immediately invert onto towel sprinkled with confectioners’ sugar. Carefully peel off the aluminum foil. Roll cake in towel, starting from narrow end. Place on wire rack to cool.
Prepare desired filling. Unroll cake. Spread with filling. Reroll cake (without the towel!). Frost or glaze with desired topping. Chill. Makes 10-12 servings.