3/4 cup sifted all-purpose flour
3/4 teaspoon baking powder
1/4 teaspoon salt
3/4 cup confectioners' sugar
4 eggs
1 teaspoon vanilla extract

Grease bottom of 15 x 10 x 1-inch jellyroll pan with vegetable oil. Line bottom of pan with wax paper. Grease paper with oil.

Sift together flour, baking powder and salt.

Beat eggs in deep bowl with rotary beater until foamy. Beat in sugar gradually and beat until thick as cream. Add vanilla extract. Sift in a little flour at a time, folding in lightly. Turn into prepared pan. Bake at 375 degrees F or until cake springs back when touched, about 13 to 15 minutes. Loosen edges of cake from pan. Turn out on tea towel that has been spread with confectioners' sugar. Remove wax paper at once. Roll cake gently with tea towel in it. Cool.

Lemonade Filling
1 (6 ounce) can frozen lemonade concentrate
Water
2 tablespoons cornstarch
2 tablespoons all-purpose flour
1/2 cup granulated sugar
2 egg yolks, slightly beaten
2 teaspoons butter

Add enough water to lemonade concentrate to make 1 1/2 cups.

Mix cornstarch, flour and sugar thoroughly in saucepan. Stir in lemon and water mixture. Stir constantly. Cook until mixture is smooth and comes to a boil. Boil 1 minute. Remove from heat.

Beat a little of the hot mixture into egg yolks which have been slightly beaten. Beat back into hot mixture. Return to heat and boil for 1 minute. Add butter and cool.

Unroll the jellyroll. Fill roll and roll up again.

Serves 10 to 12.