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In a double boiler or microwave-safe dish, melt together chocolate chips and butter. Set aside. Whisk together dry ingredients in a medium bowl and set aside.
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In a large bowl, combine sugars, eggs, half and half, extracts, and liqueur. Gradually add dry ingredients, and mix until just combined. Fold in melted chocolate mixture. Add chocolate chips and gently mix until well distributed.
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Line a baking sheet with parchment paper or a silpat. Drop dough onto the baking sheet using a mini cookie scoop or 1/2 Tbsp measuring spoon. Bake at 300 until edges are set, approximately 10-12 minutes, and allow to cool completely before serving.