- 1 stick butter
- 6-1/2 oz 70% dark chocolate
- 1/4 t salt
- 1/2 t vanilla
- 1 c sugar
- 2 eggs (at room temperature)
- 1/2 c flour
- 1 c broken walnuts (optional)
Preheat oven to 325.
Melt together butter and dark chocolate. Allow to cool to room temperature.
Mix in salt, vanilla, and sugar.
Stir in eggs, one at a time.
Add flour, then stir until almost combined.
Add walnuts (if using), then stir once or twice.
Butter and flour an 8 x 8 glass baking dish, then pour batter into dish and jiggle gently to distribute to corners.
Bake on center rack for 35 minutes, or until a toothpick or sharp knife comes out sticky, with just a few crumbs but not wet.