In a large mixing bowl, whisk together the flour, sugar, cornstarch, and salt. Add the cold butter and blend until resembles wet sand.

Fold in the cranberries and orange zest. Knead gently until the dough holds together.

Roll dough into a rectangular shape, wrap in plastic wrap, and freeze for about 20 minutes.

Preheat the oven to 325°F (160°C). Slice the dough into sticks and place them on a lined baking sheet.

Bake for about 20 minutes, until edges are lightly browned.

Cool on a wire rack for 10 minutes, then glaze with a mixture of powdered sugar and orange juice.