Begin the Gurabia adventure by preheating your oven to 350°F (180°C). Lay down a parchment paper on a baking sheet, creating the perfect stage for your delightful cookies.

In a spacious bowl, initiate a buttery symphony by combining 250g of softened unsalted butter with 1 cup of granulated sugar. Blend them into a harmonious mixture until it reaches a light and fluffy texture.

Introduce a touch of elegance by adding 2 egg yolks and 1 teaspoon of vanilla extract to the butter-sugar composition. Mix them gracefully until they merge into a smooth, velvety concoction.

Invite 2 cups of all-purpose flour to join the dance, introducing it gradually into the mixture. Stir patiently until a seamless dough emerges, showcasing the finesse of your culinary prowess. If opting for a nutty twist, gently fold in 1/2 cup of ground walnuts or almonds at this point.

Unleash your creativity by shaping small portions of the dough into enchanting balls or crescents. Place these artistic creations on the parchment-lined baking sheet, leaving ample space for them to express their magic.

Watch in awe as your Gurabia take center stage in the preheated oven, gracefully performing for 15-20 minutes or until their edges achieve a golden grandeur.

Allow your freshly baked Gurabia to take a bow on the baking sheet, engaging in a cooling ballet for a few minutes. After their performance, transfer them delicately to a wire rack, preparing for the grand finale.

As the Gurabia gracefully cool, shower them with a crescendo of powdered sugar, adding the final, sweet touch to these delightful treats.