Tahini Shortbread Cookies (Print Version)

# Ingredients:

→ Dough Base

01 - 180 g (¾ cup) tahini paste
02 - 165 g (1 ½ sticks) unsalted butter, softened
03 - 170 g (¾ cup + 1 ½ tbsp) light brown soft sugar
04 - ½ tsp vanilla bean paste (or 1 tsp vanilla extract)

→ Dry Ingredients

05 - 270 g (2 ¼ cups) plain gluten free flour blend
06 - 75 g (½ cup + 2 ½ tbsp) cornstarch
07 - ¾ tsp xanthan gum (omit if your flour blend already contains it)
08 - ¾ tsp salt

→ Coating

09 - 4 tbsp white sesame seeds
10 - 2 tbsp black sesame seeds

# Instructions:

01 - Adjust the oven rack to the middle position, pre-heat the oven to 180ºC (350ºF) and line two large baking sheets with baking paper.
02 - In a large bowl, using a wooden spoon, mix together the tahini paste, softened butter, light brown soft sugar and vanilla bean paste until smooth and combined. Note: Do not cream the mixture as that incorporates air which can cause excessive spreading during baking.
03 - Sift together the gluten free flour blend, cornstarch, xanthan gum and salt, then add to the butter mixture. Mix well with a wooden spoon until the dough starts coming together, then knead by hand until smooth. The dough should not be sticky.
04 - Chill the dough in the refrigerator for 15-30 minutes to firm it up for easier shaping.
05 - Divide the dough into two equal portions and shape each into a log about 18 cm (7 inches) in length and about 5 cm (2 inches) in diameter.
06 - Mix the white and black sesame seeds together on a large plate. Roll each cookie dough log in the sesame seed mixture until well coated.
07 - Wrap the coated logs tightly in cling film or baking paper, and chill in the refrigerator for about 2 hours or until solid.
08 - Using a sharp serrated knife, slice the logs into approximately 1 cm (½ inch) thick cookies. Place them onto the lined baking sheets, leaving about 2 cm (¾ inch) of space between each cookie.
09 - Bake one sheet at a time at 180ºC (350ºF) for about 12 minutes until light golden brown. Keep the second sheet refrigerated while the first batch bakes.
10 - Immediately after removing from the oven while still hot, you can use a round cookie cutter slightly larger than the cookie diameter to nudge them into a more perfect round shape if necessary.
11 - Allow the cookies to cool on the baking sheet for 5-10 minutes, then transfer to a wire cooling rack to cool completely.

# Notes:

01 - For the gluten-free flour, Doves Farm Freee plain gluten free flour blend works well. Alternatively, mix your own blend with 50% finely ground white rice flour, 30% potato starch and 20% maize flour by weight.
02 - The cookies keep well in an airtight container in a cool dry place for about 2-3 weeks.