INGREDIENTS
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¾ cup unsalted butter (or margarine)
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1 ¼ cup granulated sugar
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1 Tbsp rum or 1 tsp rum extract (optional)
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1 large egg
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½ cup brown rice flour
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½ cup tapioca starch
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½ cup cornstarch
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1 tsp xanthan gum
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¾ cup Dutch-processed cocoa powder
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1 tsp baking powder
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1 tsp baking soda
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¼ tsp salt