Retro Betty Crocker Chocolate Brownie Pie

This Chocolate Brownie Pie is truly wonderful and simple!  I've posted several different recipes before, but here's another recipe, this time from a Retro Betty Crocker Gold Medal Flour advertisement. It really "Tastes like Chocolate Brownies!" You can never have too many Brownie Pie recipes!

The following recipe is from the ad, but you can modernize and improve it by using an excellent dark chocolate (cut down on the sugar), and make your own pie crust.

CHOCOLATE BROWNIE PIE

Ingredients
2/3 cup butter
5 oz unsweetened baking chocolate
1-1/4 cups sugar
2 tsp vanilla
3 eggs
1 cup flour
1/2 cup chopped walnuts, toasted
1 frozen deep dish pie crust
Whipped cream, if desired

Directions
1. Heat oven to 350º.
2. In 1-quart saucepan, melt butter and chocolate over low heat, stirring constantly. Cool 5 minutes.
3. In medium bowl, beat sugar, vanilla and eggs with electric mixer on high speed 5 minutes. Beat in chocolate mixture on low speed, scraping bowl occasionally. Beat in flour just until blended, scraping bowl occasionally. Stir in walnuts. Spread in frozen pie crust.
4. Bake 37 to 42 minutes or until toothpick inserted halfway between center and edge of pan comes out almost clean. Cool in pan on wire rack, at least 2 hours. Cut into wedges.
Serve with whipped cream, if desired.