Preheat Oven to 160 degrees (C) / 320 degrees (F).
In a medium bowl add Almond flour, pepper, salt, and baking powder, whisk until smooth.
Add Basil, Cayenne pepper, Garlic and stir until evenly combined.
Add in the Pesto and egg and whisk until the dough forms into coarse crumbs.
Slice the butter into the cracker mixture, mix with the fork or your fingers until the dough forms into a ball.
Transfer the dough to a prepared cookie sheet and spread out the dough thinly until it is about 1 ½ mm thick. Ensure equal thickness so the crackers will cook evenly.
Bake for 14 to 17 minutes until the color will be Golden Brown.
Remove from the oven once it is cooked, and slice into desired sizes.