Place Butter and Dark Choc Chips in saucepan on a low heat and stir until well combined, set aside.
Insert Butterfly into Thermomix bowl.
Place eggs, sugar, vanilla, salt, baking powder into TM bowl and whip 2 min/Butterfly/speed 4.
Remove MC and slowly pour chocolate and butter mix through hole in lid while mixing 1 min/speed 3.
Add flour and cocoa powder to TM bowl and mix 10 sec/speed 4. Repeat if necessary
Add pecans and milk choc chips on 10 sec/Reverse/speed 3.
Place bowl in fridge for 15-20 mins until mixture has cooled and stiffened up so you can handle it.
Prepare your tray with baking paper and preheat oven to 180°C fan forced,
Using a cookie scoop, scoop out batter onto tray as you would big cookies.
Bake in oven for 8-12 minutes.
Allow to cool a little before trying them!!
Serve with milk or ice cream and enjoy