Banana Split with shortening

2/3 cup shortening 1 1/4 cups sugar 4 eggs 3 1/2 cups all-purpose flour 2 1/2 teaspoons baking powder 1 teaspoon baking soda 1/2 teaspoon salt 1 1/2 cups[...]

2 quarts vanilla ice cream , softened 12 ounces semisweet chocolate, chopped 1 banana , very ripe, mashed (1/2 cup) 1 cup heavy cream 2 pints pistachio ice[...]