These Christmas polvorones are buttery, crumbly, and filled with plenty of nuts. They practically melt in your mouth, with a generous coating of powdered sugar that makes them look especially pretty on a holiday cookie tray.
Prep: Preheat the oven to 300°F (150°C) and line a baking sheet with parchment paper.
Mix: Add the flour, softened butter, cornstarch, powdered sugar, salt, and chopped nuts to a mixing bowl. Mix on low speed until everything starts to come together.
Make the Dough: Gently knead the mixture just until you have a smooth dough. It should hold together without feeling sticky.
Shape: Portion the dough into small balls. For bite-sized polvorones, use about 15 g of dough per cookie.
Chill: Arrange the cookies on the prepared baking sheet and refrigerate for about 15 minutes.
Bake: Bake for 12 to 15 minutes. The cookies should be set but still fairly pale rather than deeply browned.
Coat: While the polvorones are still warm, carefully roll or dust them generously with powdered sugar so it sticks to the outside.
Cool: Let them cool completely before serving. They will become more delicate and crumbly as they cool.