Dorie Greenspan’s Sablés (Basic Sugar Cookies)

Ingredients

• "Royal Icing":/recipes/11097, for decorating (optional)
• 2 cups all-purpose flour
• 2 large egg yolks, at room temperature
• ½ teaspoon fine salt
• ¼ cup sifted powdered sugar
• ½ cup granulated sugar
• 2 sticks (8 ounces) unsalted butter, at room temperature

Heat the oven to 350°F and arrange a rack in the middle. Line a baking sheet with parchment paper; set aside. Place the butter in the bowl of a stand mixer fitted with a paddle attachment (or in a large bowl with a hand mixer) and beat on medium speed until smooth and very creamy, about 1 minut...

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