Pineapple Supreme Cake

Bake cake as directions on box.Make 2 layers. Cool completely.

Pineapple Filling:
1 c.sugar
2 tbsp.flour
1/8 tsp salt
2 egg yolks,beaten
1 large can crushed pineapple,with juice
Mix above ingredients and boil over low heat until thickened.Cool. Spread between cake layers and on top layer . Frost cake with 7 minute frosting.

7 Minute Frosting:
3 egg whites-unbeaten
1 1/2 c. sugar
dash salt
1 tsp.vanilla
5 tbsp.water
2 tbsp.white karo syrup
In top of double boiler over hot ,not boiling water,beat with electric mixer until stiff peaks form.Remove top pan from over hot water and continue to beat until frosting holds its shape.
Frost cold cake.