Using an electric mixer, beat the butter and brown sugar until fluffy and pale. Add the flour gradually and mix just until incorporated.
Grease an 8-inch cake pan and transfer the dough (it will be a bit crumbly), pressing it into an even layer with your fingers- or the bottom of a flat cup or dish.
Prick the dough surface evenly, using a fork, then score the dough into 16 triangles using a very sharp knife.
Cover with plastic wrap and refrigerate for at least 20 minutes.
Preheat the oven to 325 degrees Farenheit.
Bake for about 25-30 minutes, until the dough is a very light golden brown and the surface looks dry. Watch carefully so it doesn't overbake!
Remove from the oven and immediately cut the shortbread using a sharp knife, along the scored lines. Allow it to cool completely in the pan before separating the pieces.
The shortbread will keep in an airtight container for several days. Enjoy!
Notes
Recipe adapted from Food 52's Baked cookbook.
Keyword baking, breakfast, brown sugar, pastry, shortbread