Line an 8×8 pan with plastic wrap. Set aside.
In a food processor, combine nuts. Process for 15 seconds.
Add egg white powder. Process for 3 – 5 seconds.
Add remaining ingredients. Process for 30 seconds. Pulse a few times if needed.
Dump mixture into prepared 8×8 pan. Press down evenly and firmly. Flip out onto cutting board. Cut into 9 squares.
Store in the refrigerator or freezer. Place parchment paper or plastic wrap between each one to prevent sticking.