INGREDIENTS
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1/4 cup sour cream
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1/2 cup oil (I used canola)
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1 1/4 cup granulated sugar
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2 tsp vanilla extract
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1 large egg
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1 egg yolk
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1 1/3 cup white rice flour
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2/3 cup potato starch
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2/3 cup tapioca starch
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3 Tbsp cornstarch
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1 1/2 tsp xanthan gum
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1 tsp baking soda
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1 tsp baking powder
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1/4 tsp salt