"This simple, not-too-sweet cookie recipe comes from author Elizabeth Gilbert's "At Home on the Range," a republication of her great-grandmother's 1947 cookbook...."
INGREDIENTS
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1/3 cup unsalted butter, plus more for baking sheet
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1 1/2 cups all-purpose flour, plus more for work surface
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1/2 teaspoon baking powder
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1/4 teaspoon baking soda
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1/4 teaspoon salt
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1 cup sugar
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1 large egg
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1/3 cup sour cream
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1/4 teaspoon pure vanilla extract (optional)
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Sanding sugar, for sprinkling