2/3 cup butter
5 oz unsweetened chocolate
2 teaspoons vanilla
½ teaspoon salt
2 cups sugar
1 cup sifted flour (add 1 Tbls for high altitude)
Preheat oven to 400°.
Melt the butter and chocolate in a double boiler. Remove from heat, add vanilla and set aside
Beat eggs and salt. Add the sugar and beat at high speed until white (about 5 minutes.)
Add chocolate and butter mixture to the eggs and beat on low until just mixed.
Add flour and mix until just combined.
Pour into greased and floured 9X13 (or so) pan and put in oven.
Immediately reduce heat to 350°. Bake for about 35 minutes (toothpick should not come out clean.)