Impossible Rich Brownie Pie

IMPOSSIBLE RICH BROWNIE PIE

4 large eggs
1/2 cups packed brown sugar
1/4 cup margarine or butter, melted
1/2 cups baking mix
1 (4 oz.) bar sweet cooking chocolate, melted and cooled OR
1/2 cup cocoa PLUS 1/4 cup additional butter or shortening PLUS 1/4 cup additional sugar
1/2 cup granulated sugar (omit at altitudes of 3,500-6,500 feet)
3/4 cup chopped nuts

Heat oven to 350 degrees. Grease pie plate, 9 by 1 1/4 inches. Beat large eggs, margarine and chocolate until smooth, 10 seconds in blender on high or 30 seconds with hand beater. Add brown sugar, baking mix and granulated sugar. Beat until smooth, 1 minute in blender on high, stopping blender occasionally to scrape sides, or 2 minutes with hand beater. Pour into plate, stir in the nuts. Bake until knife inserted in center comes out clean, about 35 minutes. Serve with ice cream or sweetened whipped cream if desired.
Other suggested toppings: Whipped cream sprinkled with crushed peppermint candies or brown sugar, flavored whipped cream, whipped cream cheese, candied fruit.