Preheat the oven to 350 degrees F. Line two 9x5 loaf pans with parchment paper so that there is parchment hanging over the long sides of the pan.
In a large bowl, combine the gluten free flour blend and sugar.
Add buttery spread and cut in with a pastry cutter until the mixture looks like small crumbs.
Knead until smooth, and pat into the prepared loaf pans. Poke holes all over the top with a toothpick.
Bake at 350 degrees F for 30-35 minutes until golden brown. Cool in pans, then remove using the parchment paper to pull the shortbread out of the pans.
Once cool, cut into squares. They are quite rich, so I cut them into small squares, about 1.5×1.5 inches.
Notes
Nutrition facts are for one shortbread square.Store in an airtight container. Shortbread should stay fresh for about 4 days.