
Soft, delicious sugar cookies decorated with homemade royal icing — just like grandma made them! Absolutely perfect for the holiday season, this Christmas sugar cookie recipe has been passed down through the generations in my family, and I can't wait to share it with you.
Preheat the oven to 350°F (177°C). Line a sheet tray with parchment paper or a silicone baking mat.
In a stand mixer fitted with a whisk attachment (or a large bowl with a handheld mixer), whisk together the egg whites and vanilla extract until white and foamy, then gradually add in the powdered sugar until the mixture forms stiff peaks. Finally, add in water one teaspoon at a time until you can make a figure eight with the icing that disappears in eight seconds.