INGREDIENTS
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2/3 cup water
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1/2 cup cocoa powder (dutch-processed)
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4 oz semisweet chocolate, chopped into pieces (or semisweet chocolate chips, not chopped)
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1 1/2 tsp instant coffee (optional)
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1 cup (2 sticks) butter, cut into pieces
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2 1/4 cup granulated sugar
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1 1/2 tsp vanilla extract
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2 eggs lightly beaten + 2 yolks (room temperature, preferably)
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1/2 tsp salt
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1 3/4 cup all-purpose flour