Chocolate-cherry torte recipe from 1966 - Click Americana

Ingredients

• 1 package 2-layer-size chocolate cake mix
• 1/4 cup granulated sugar
• 2 tablespoons cornstarch
• Dash salt
• 1-pound 4-ounce can frozen pitted tart red cherries, thawed
• 1 teaspoon rum extract
• 1 cup softened butter or margarine
• 4-1/2 cups sifted confectioners’ sugar
• 2 ounces no melt unsweetened chocolate
• 3 egg yolks