Brownies

8 squares of unsweetened baking chocolate
3 sticks butter
4 cups sugar
6 eggs
2 tsp vanilla
2 cups flour
1 cup walnuts, chopped (optional)

Spray 9x13 inch pan with cooking spray.
Heat oven to 350 degrees.
Microwave butter and chocolate squares for 30 second intervals until they're melted together.
Mix other ingredients into chocolate mixture. Stir thoroughly.
Pour batter into pan/stone and bake for 35-40 minutes, or unitl toothpick stuck in the middle comes out clean.