Mix nuts, flour, and sugar.

Using a pastry blender, work in the butter until the mixture forms uniform crumbs.

Sprinkle lemon juice and amaretto or brandy over mixture and toss together lightly with a fork until blended.

Mixture should be crumbly.

Lightly spread mixture into a buttered and floured 12 inch round pan with 1 inch high sides.

Do NOT press into the pan.

Bake at 350°F until browned, 50 to 60 minutes.

Let cool on a rack.

Break into chunks before eating.