Coat 2 (6-ounce) souffle dishes or custard cups with cooking spray.
Sprinkle dishes evenly with 1 tablespoon sugar, carefully shaking to coat bottom and sides of each dish; set aside.
Combine 1 tablespoon sugar, milk, and flour in a non-aluminum saucepan, stirring with a wire whisk until blended. Cook over medium heat, stirring constantly, until thickened and bubbly.
Remove from heat.
Beat egg yolk until thick and pale. Gradually stir about one-fourth of hot mixture into yolk; add to remaining hot mixture, stirring constantly. Stir in orange extract and orange rind; set aside.
Beat egg white, 1/2 teaspoon powdered sugar, and cream of tartar in a bowl at high speed of an electric mixer until stiff peaks form. Fold egg white mixture into orange mixture. Spoon into prepared dishes.
Bake at 375 for 15 minutes or until puffed. Sift remaining 1 teaspoon powdered sugar over souffles.