Preheat the oven to 325º F (163 degrees C). Grease an 8-inch-square baking pan or line it with parchment paper. Set aside ⅓ cup chocolate morsels.
Heat 1 ⅓ cups morsels, sugar, butter, and water in a small saucepan over low heat, constantly stirring, until chocolate and butter are melted.
Pour into a medium bowl. Cool slightly. Stir in eggs, one at a time, with a whisk until blended. Stir in vanilla extract.
Add the flour and salt; mix well with a wooden spoon. Stir in remaining ⅓ cup morsels and nuts if using. Pour into prepared baking pan.
Bake for 30 to 35 minutes or until the wooden pick inserted in the center comes out slightly sticky. Cool in pan on wire rack. Cut into bars.
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Notes
Let the brownie batter cool slightly before adding your eggs.
Don't forget to add the 2 tablespoons of water to the pan with the butter and chocolate. It matters!
These brownies can be made with semi-sweet chocolate chips, but they won't have the rich flavor you get from dark chocolate.
Storing: Store at room temperature for 5-7 days.Make-Ahead Instructions: Brownies freeze well for up to 3 months. Thaw overnight in the refrigerator, then bring to room temperature before serving.Nutritional information is approximate and was calculated using a recipe nutrition label generator and will vary based on cooking methods and brands of ingredients used.