Strawberry Cake - cooking recipe

Ingredients

1 white cake, prepared as directed (13x9)
3 (10 ounce) packages sliced frozen strawberries, thawed
Icing
2 tablespoons flour
1 cup evaporated milk
1 cup sugar
1/2 cup butter
1 teaspoon vanilla

Preparation

Prepare cake as directed in 13x9 pan, from a mix or using your favorite white sheet cake recipe.
When cake is hot from oven, poke holes all over with a skewer and pour strawberries over hot cake.
Prepare icing (rest of ingredients) according to the following directions: In a small saucepan, pour small amount of milk in flour and mix till smooth.
Add rest of milk and cook till thick, stirring to avoid lumps.
Set aside.
In a medium bowl, beat sugar, butter, and vanilla till creamy.
Make sure sugar is dissolved.
Add to cooked flour mixture, blend well.
Pour over cake and refrigerate for at least 3 hours, serve chilled with whipped cream.