01 -
Preheat oven to 160°C. Line a 20 x 20 cm baking pan with parchment paper.
02 -
In a large mixing bowl, beat vegan butter and powdered sugar together until light and fluffy.
03 -
Add all-purpose flour, cornstarch, chopped thyme, and salt to the bowl. Mix until a soft dough forms.
04 -
Evenly press dough into the prepared pan. Prick the surface with a fork to prevent bubbling.
05 -
Bake for 30–35 minutes, until edges are lightly golden. Allow to cool in the pan for 10 minutes.
06 -
While shortbread cools, whisk together powdered sugar, grapefruit juice, zest, and a pinch of salt until smooth.
07 -
Pour glaze over the slightly warm shortbread, spreading evenly. Let stand for 5 minutes, then score into triangles.
08 -
Allow shortbread to cool completely before separating pieces. Garnish with extra thyme leaves and a sprinkle of sea salt if desired.