"A traditional recipe for soft, butter-flavored thumbprints filled with jam...."
INGREDIENTS
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½ cup unsalted butter, at room temperature ½ cup vegetable shortening ½ cup light brown sugar 3 egg yolks 2 tablespoons milk 1½ teaspoons vanilla extract ¼ teaspoon salt 2 cups all-purpose flour 1 cup your favorite jam, jelly