Instructions
Preheat oven to 350F.
Thoroughly grease a 6 or 6.5in cast iron skillet with coconut oil.
In a small saucepan over medium low heat, melt butter and almond butter.
Add erythritol and stir regularly until sweetener is mostly dissolved (~3 minutes).
Stir in vanilla extract and salt.
Remove pan from heat, and allow to cool slightly (2-3 minutes).
Stir in cocoa powder, almond flour, and baking powder.
Add egg and WakeShake, and mix until well combined.
Gently fold in chocolate and nuts.
Add batter to prepared pan and bake for 25-30 minutes, or until surface appears dry around the edges and center is set.