Heat oven to 350 degrees. ... oblong pan. Beat butter, sugar, eggs, and vanilla ... cooking, beat egg whites until stiff enough to hold ... vanilla; beat until icing holds its shape.
Combine corn syrup and salt ... and add peanut butter, stirring until melted. Pour ... over beaten egg whites, beating constantly. Serve warm or cool over ice cream. Makes 2 to 2 1/2 cups.