| 1 |
Line an 8-inch-square metal baking pan with foil. In top of a double boiler set over barely simmering water, or on low power in a microwave oven, melt butter and chocolate together. Stir often and remove from heat when a few lumps remain. Stir until smooth. |
| 2 |
Stir in sugar, vanilla and salt. Stir in eggs one at a time, followed by flour. Stir until very smooth, about 1 minute, until mixture pulls away from sides of bowl. Add nuts, if using. Scrape batter into prepared pan. Bake in a preheated 400-degree oven 20 minutes. |
| 3 |
Meanwhile, prepare a water bath: Pour ice water into a large roasting pan or kitchen sink to a depth of about 1 inch. Remove pan from oven and place in water bath, being careful not to splash water on brownies. Let cool completely, then lift out and cut brownies into 1-inch squares or wrap in foil. |
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