Almond “flour” or almond meal is available at health food stores and in the health food aisle of your supermarket. Bob’s Red Mill makes it, as does King Arthur (toasted, ground almonds). Trader Joe’s carries almond meal where they display their nuts. You can make your own. Grind up blanched, slivered almonds or whole, raw almonds in a food processor until finely ground. Measure out two cups of almonds to get 1½ C almond meal. Do not over-process or the almonds will become pasty. A little crunch and texture in the almond meal gives this cake character.