Preheat your oven to 300°F (150°C).

Gather all ingredients and allow the butter to soften to room temperature.

In a large mixing bowl, combine the flour, butter, and ½ cup sugar.

Mix until a soft dough forms and holds together when pressed.

Press the dough evenly into an ungreased 11½ x 7½-inch jelly roll pan.

Smooth the surface with your hands or the back of a spoon.

Use a fork to prick the dough all over. This helps prevent puffing during baking.

Sprinkle the remaining tablespoon of sugar evenly over the top.

Bake for 20–30 minutes or until the edges are lightly golden brown.

Remove from the oven and immediately cut into squares or fingers while still warm.

Allow the shortbread to cool completely in the pan.

Carefully remove and serve