Melt the stick of butter or margarine along with the 2 squares of unsweetened chocolate in a saucepan over low heat, stirring occasionally. Let this mixture cool to room temperature. To the melted mixture add 1 cup of sugar, 1 well beaten egg, 2/3 cup of self-rising flour, 1 teaspoon of vanilla extract and 1 cup of pecans. Mix all together and pour into an 8 inch by 8 inch baking pan (or dish). Bake at 350 degrees 20 to 25 minutes. Brownies will be done when a toothpick placed in the center comes out clean. Remove cooked brownies from the oven and cool to room temperature. Cut into 16 squares. Place on a serving dish. Go crazy on brownies!