Prepare the dry ingredients: Sift 4 1/2 cups of all-purpose flour into a separate large bowl. With a zester, zest the lemon and add the lemon zest to the bowl with the flour. Add the baking powder and salt. Combine flour, lemon zest, baking powder, and salt. Set aside.
4 1/2 cups all-purpose flour, lemon zest from one lemon, 1 teaspoon baking powder, 1/4 teaspoon salt
Whip the butter: Add 2 cups of softened unsalted butter to a large bowl. Using the paddle attachment, beat on medium-low (#4 on KitchenAid) for a few minutes. If the butter isn't fluffy, let it warm slightly at room temperature or mix on a higher setting.
2 cups 454 grams unsalted butter (room temperature and softened)
Mix in the eggs: After 5 minutes, the butter should be light and fluffy. Scrape the sides of the bowl and paddle with a spatula. Add the icing sugar and mix on medium speed (#4 on a KitchenAid) for a couple of minutes. Whisk the egg yolk, vanilla, and brandy in a separate bowl, then slowly add it to the butter, mixing for 30-45 seconds until incorporated. Add almond extract if desired. Turn off the mixer and preheat the oven to 350°F.
3/4 cup icing sugar or confectioner's sugar, 1 egg yolk, 2 tablespoons pure vanilla extract, 2 oz Metaxa brandy or cognac
Bake the almonds: While the oven preheats, spread the slivered almonds on a baking tray and toast for 5-10 minutes, watching closely to prevent burning. This step adds extra flavour, but can be skipped as the almonds will bake inside the cookies.
100 grams blanched
Mix in the flour: Add the flour mixture (flour, lemon zest, baking powder, and salt) to the butter mixture and mix on low (#2 on a KitchenAid) until just combined. Be careful not to overmix. Alternatively, mix by hand with a spatula until all the flour is absorbed.
Mix in almonds and cool the dough: Let the toasted almonds cool, then add them to the dough and mix. The dough should be pliable but not sticky. If it's too soft, add 1 tablespoon of flour and mix. Cover with plastic wrap and refrigerate for 10-15 minutes.
Shape the kourabiedes: Remove the dough from the fridge, roll the cookie dough into 2" inch balls and place them on a cookie sheet. Lightly press down on the cookies to flatten them slightly before putting the cookies in the oven.
Bake the kourabiedes: Once the oven has preheated to 350 degrees F, place the cookies in the oven for 20-25 minutes or until a light golden brown colour. The baking time may need to be adjusted depending on the size of your cookies.
Cool and sprinkle with icing sugar: Remove the cookies from the oven on a heat-resistant surface and allow them to cool for a few minutes before placing them on a cooling wire rack. Let the cookies cool completely before dusting them with icing sugar. Once the cookies have thoroughly cooled, use a sifter and sprinkle the cookies with icing sugar. How much icing sugar you add can be up to you! Enjoy!
3 cups of icing sugar or confectioner's sugar