Preheat your oven to its lowest setting. My oven goes down to 150 °F, but if yours goes lower that's even better!
Spread out your almond pulp on a baking tray to as thin as you can get it.
Place the tray in the oven and let the pulp dehydrate for 4-8 hours. The length you keep it in the oven depends on the temperature of your oven. It will be done when all the moisture is baked out and it's dry and crumbly.
Once dehydrated, place the dried out pulp into food processor and process until it becomes a fine flour.
Notes
You can bake with the almond flour right away or store it in your freezer for a long shelf life.