peanut butter blossoms recipe

Ingredients: 1/2 cup unsalted butter, softened 1/2 cup creamy peanut butter 1/2 cup granulated sugar 1/2 cup packed brown sugar 1 large egg 1 teaspoon vanilla extract 1 3/4 cups all-purpose flour 1 teaspoon baking soda 1/2 teaspoon salt