1/2 c. flour
1 tsp. baking powder
1/4 tsp. salt
4 egg yolks
1/2 tsp. vanilla
1/3 c. sugar
4 egg whites
1/2 c. sugar
Sifted powdered sugar
1/2 c. jelly or jam

Grease and lightly flour a 15 x 10 x 1 inch jelly roll pan. Stir together flour, baking powder, and salt. In a small mixer bowl beat egg yolks and vanilla at high speed of electric mixer 5 minutes or until thick and lemon colored. Gradually add the 1/3 cup sugar beating until sugar is dissolved. Thoroughly wash beaters.

In a large mixer bowl beat egg whites at medium speed until soft peaks form. Gradually add the 1/2 cup sugar, continue beating until stiff peaks form. Fold yolk mixture into whites. Sprinkle flour mixture over egg whites, fold in gently, just until combined. Spread batter evenly in prepared pan. Bake at 375 degrees for 12-15 minutes or until done. Immediately loosen edges of cake from pan and turn out onto a towel sprinkled with sifted powdered sugar.

Starting with narrow end, roll warm cake and towel together; cool on a wire rack. Unroll; spread cake with jelly within 1 inch of edges. Roll up cake. Sprinkle top with powdered sugar.