Combine all brownie ingredients in a large mixing bowl and mix well to combine
Line slow cooker with non stick baking paper (I used a 7L Breville Slow Cooker)
Pour brownie batter into lined slow cooker, cover with tea towel for the Tea Towel Trick
Cook on high for approx 1hr 20m - 1hr 30m
Cooking time will vary between slow cookers but just use a skewer to test
When skewer inserted into brownie comes out clean and it bounces back lightly to touch it's ready
Cook fudge
While your brownie is cooking use a second slow cooker to make your fudge. I use my 1.5L slow cooker for fudge. If you have only one cooker the brownie can be cooked first then it can sit cooling while you make the fudge, that's ok too :)
Place all fudge ingredients into slow cooker, cook on low - lid off - for 90mins.
Stir every 15mins or so using a metal spoon to stir.
Assemble
Lay brownie in a large tray (I use a biscuit oven tray)
When fudge is cooked pour fudge over the top of the brownie
Smooth fudge to cover brownie
Place in fridge to set. I leave mine overnight but approx 4hrs should set it also.
When set use a sharp knife and work fast to cut into pieces
Store in fridge
Eat and enjoy :)
Notes
You can make a next level version of this (trust me you want to!) by following this recipe >> Brownie Bliss Bombs