Chocolate Cookies "Day and Night"

Ingredients:

• 1/2 cup butter, room temperature
• 1/2 cup icing sugar, sifted
• 3 large egg yolks
• 1 tbsp. flour for baking and cakes
• 1/4 cup cocoa powder
• 2 tablespoons corn flour
• 1/2 tsp salt
• Powdered sugar, for sprinkling

Preparation:

1. Beat the butter and powdered sugar until smooth. Then add the egg yolks all at once. Beat until the ingredients are well combined.
2. In a separate bowl, sift together the flour, cocoa powder, cornmeal, and salt. Add this mixture to the butter mixture and mix until smooth. Form the dough into a log approximately 5 cm in diameter, wrap it in plastic wrap, and refrigerate until ready to use.
3. Preheat oven to 160°C. Line 2 baking sheets with parchment paper.
4. For making cookies, cut the dough into slices about 0.3 cm thick and arrange them on the prepared baking sheets. Bake for about 12 minutes, until the surface of the dough is no longer shiny. Once the cookies have cooled, dust them with powdered sugar.
5. Cookies can be stored in an airtight container for up to 4 days.