0.25 cup confectioners' sugar, or as needed for dusting
Instructions
Mix flour, 1/2 cup confectioners' sugar, cornstarch, and salt together in a bowl.
Beat butter with an electric mixer in a separate bowl until soft and fluffy. Mix in white sugar and vanilla until well combined.
Add dry ingredients to wet ingredients in 3 batches, beating until just blended after each addition. Divide dough in half, roll each half into a log, and refrigerate until firm, about 2 hours.
Preheat the oven to 350 degrees F (175 degrees C).
Slice dough logs into forty-eight 1/4-inch-thick cookies and place onto ungreased baking sheets.
Bake in the preheated oven until just starting to turn golden around the edges, 8 to 10 minutes.
Remove from the oven and let cool for 1 minute on the baking sheet. Transfer cookies to wire racks to cool completely, 25 to 30 minutes.
Use a knife to generously spread dulce de leche onto 1/2 of the cooled cookies. Sandwich remaining cookies on top and place onto a serving tray.
Lightly dust finished cookies with remaining confectioners' sugar.
Nutritional Facts
Per 24 servings
Calories: 175
Carbohydrate: 23g
Fat: 8g
Fiber: 0g
Protein: 2g
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