INGREDIENTS
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⅓ cup semisweet chocolate chips
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1 tbsp unsalted butter
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½ tsp vanilla extract
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1 large egg yolk
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1 tbsp warm water
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2 tbsp and 2 tsp granulated sugar
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2 large egg whites, room temperature
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⅛ tsp fresh lemon juice
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Pinch of salt
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Pinch of cinnamon
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Confectioners’ sugar for garnish