INGREDIENTS
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1 cup brown rice flour *
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3/4 cup oat flour *
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1/2 cup tapioca starch *
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1/4 cup potato starch *
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1 teaspoon xantham gum *
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2 teaspoons baking powder
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1/4 teaspoon kosher salt
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1/2 cup butter
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1 cup sugar
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1 egg
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1 teaspoon vanilla
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2 tablespoons lemon zest, finely minced, about 1 large lemon's worth
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1 tablespoon lemon juice
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Glaze Ingredients:
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2 cups powdered sugar
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2 tablespoons lemon juice