Pistachio Shortbread Cookies (Print Version)

# Ingredients:

→ Cookie Base

01 - 225g unsalted butter, room temperature
02 - 125g powdered sugar
03 - 1 1/2 tsp kosher salt
04 - 2 tsp pure vanilla extract
05 - 290g all-purpose flour

→ Mix-ins & Coating

06 - 90g toasted, chopped pistachios
07 - 60g coarse or sanding sugar, for decorating
08 - 1 egg, beaten for egg wash

# Instructions:

01 - In a stand mixer fitted with the paddle attachment (or a large bowl with hand mixer), combine the butter, powdered sugar, vanilla, and salt. Beat on medium-low until combined and creamy, about 1 1/2 minutes.
02 - Add the flour and pistachios, and mix until just combined and the dough starts to clump together, about 2 minutes.
03 - Turn the dough out onto a cutting board and form into a flat disc. Cut the dough in half and shape each half into a 23cm long log. Wrap each log in plastic wrap and freeze for 30 minutes until firm.
04 - Preheat your oven to 180°C (350°F).
05 - Remove the dough from freezer and unwrap. Brush each log with beaten egg, then roll in the coarse sugar, coating the sides evenly.
06 - Using a sharp chef's knife, cut the dough into 8mm thick slices. Place cookies on a baking sheet lined with parchment paper or a silicone baking mat. Allow about 20 cookies per standard baking sheet as they don't spread much during baking.
07 - Bake for 18-20 minutes, rotating the baking sheet 180° halfway through for even browning. Bake sheets one at a time for best results.
08 - Let the cookies cool completely before eating to achieve their perfect buttery, crumbly texture. Store in an airtight container for up to 4 days.

# Notes:

01 - If starting with raw pistachios, toast them on a baking sheet for 12 minutes at 180°C (350°F) then cool to room temperature before chopping.
02 - Dough logs can be frozen for up to 2 months for later use.