Make and chill the soufflé base and the Spiced Crème Anglaise up to 3 days ahead.
• 1 cup whole milk
• 1/4 cup unsalted butter
• 1/2 cup all-purpose flour
• 1/2 cup granulated sugar
• 5 eggs, separated
• 1 tablespoon unsalted butter, softened
• 2 tablespoons granulated sugar
• 1/4 teaspoon cream of tartar
• 2 tablespoons canned pumpkin
• 1 teaspoon pumpkin pie spice
• Powdered sugar
• 1 recipe Spiced Crème Anglaise (below)
For soufflé base, in small saucepan heat milk over medium heat. In medium saucepan, melt 1/4 cup butter over medium heat. Stir flour into melted butter; mix well to combine. Reduce heat to low; stir frequently. When milk simmers, add the 1/2 cup granulated sugar, stirring 2 minutes to dissolve. Add milk mixture to butter mixture; whisk to combine, cooking over medium heat until ball forms and mixture releases from sides of pan.
Immediately place mixture in bowl of stand mixer fitted with paddle (or place in a large mixing bowl and use a hand mixer); beat on medium-low speed for 10 minutes.
Add egg yolks to soufflé base, one at a time, beating until each yolk is incorporated before adding the next. Set aside; allow to cool (or cover and chill up to 3 days).
Generously butter six 10-ounce soufflé dishes or custard cups with the 1 tablespoon softened butter, covering entire surface including rim. Coat buttered dishes with 2 tablespoons granulated sugar, rotating dishes to coat them evenly. Tap out any excess sugar; set aside.
Stir pumpkin and pumpkin pie spice into soufflé base; mix well to combine.
Preheat oven to 350°F. Beat egg whites and cream of tartar with an electric mixer until stiff peaks form (tips stand straight). Gently fold half the egg whites into soufflé base. Fold in remaining egg whites. Gently pour batter into prepared soufflé dishes. Be careful not to drip batter on rims, or soufflés may not rise evenly.
Bake in center of preheated oven 35 minutes or until lightly browned and set on top. Remove from oven, place on small serving plate and dust with powdered sugar. Hurry soufflés to table. Poke hole in top of soufflé; pour Spiced Crème Anglaise into hole. Devour immediately. Makes 6 servings.
Spiced Crème Anglaise:
Nest a medium mixing bowl in larger bowl filled with ice water; set aside. In another mixing bowl whisk together 2 eggs, 2 egg yolks, and 1/4 cup granulated sugar; set aside. In small saucepan heat 1 cup whole milk over medium-high heat to simmer. Temper egg mixture by slowly pouring 1/4 cup hot milk into egg mixture, whisking constantly. Add another 1/4 cup hot milk, whisking constantly. Now whisk tempered egg mixture back into saucepan with milk, whisking constantly. Stir constantly with wooden spoon over medium heat until mixture reaches 175°F when tested with instant-read thermometer or until mixture just coats back of wooden spoon. Remove from heat; immediately transfer to bowl in ice bath and stir to stop cooking. Stir occasionally until cool. Pass mixture through fine mesh strainer. Stir in 1/2 teaspoon pumpkin pie spice and 1/4 teaspoon pure vanilla extract. Refrigerate until ready to serve, or up to 3 days.