Cream together unsalted butter with granulated and brown sugars until light and fluffy, about 3-5 minutes.

Beat in the egg, along with the vanilla extract and orange zest until smooth.

In a separate bowl, whisk together flour, baking powder, and salt. Gradually add to wet ingredients, stirring until combined.

Gently fold in the dried cranberries with a spatula.

Shape into logs, wrap in plastic wrap, and chill for at least 2 hours or overnight.

Preheat oven to 350°F (175°C). Slice chilled dough and arrange on baking sheets. Bake for 10-12 minutes until edges are golden.