Pour hot water over the almonds so that they are well covered and let them
soak for at least 6 hours.
Line the bottom of a 9-inch springform pan with parchment paper. Butter
the paper and sides of the pan well, then dust with flour.
Position oven rack to the middle. Heat the oven to 325 degrees F.
Chop the nuts and grind them a little at a time. They should not be too
coarse or too fine. Set aside.
Beat egg whites until fluffy. Add salt and continue beating until whites
are stiff. Add yolks, one at a time, and continue beating until they are incorporated.
Mix the dry ingredients together and, beating at low speed of an electric
mixer, gradually add them to the eggs. Add the brandy and almond extract, mix
well, then pour the batter into the prepared pan.
Bake for 1 1/4 hours.
Remove the cake from the pan after it is cold.
This cake keeps indefinitely if stored in a cool, dry place. Do not store it
in the refrigerator.