Classic slice and bake cookie dough that turns into buttery shortbread cookies, perfect for tea or holidays.
1/2 cup granulated sugar
1/4 cup confectioners sugar
1/2 teaspoon salt
3 large egg yolks
2 cups flour
Beat the butter at medium speed until smooth and very creamy. Add the sugars and salt and beat until well blended, about 1 minute. The mixture should be smooth and velvety, not fluffy and airy. Reduce...
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