Line a 9 x 9 inch dish or tin with greaseproof or cling film, covering the base and sides. Set aside
Add the walnuts, pecans, cashews and oats to a food processor and whizz until the nuts are fairly finely chopped. Tip out into a bowl
To the food processor add the stoned dates, goji berries, peanut butter, cacao powder, vanilla and coconut oil and pulse until well combined. This might take quite a few pulses to chop the dates and blend everything back together. Scrape down the sides of the bowl as needed
Once the dates are well chopped and you have a sticky mess, tip the nuts back into the processor and give a few quick pulses to amalgamate them
Tip into your prepared tin and push out to the corners, flattening the top. Pop into the fridge to chill for a couple of hours.
When it's firm enough to cut and hold its shape tip out onto a chopping board and cut into bite sized squares - I cut the whole thing into long strips then cut those strips into squares. I also trim the edges first to get nice even squares - cookies perks ?
Put back in the fridge while you melt the chocolate
Melt the chocolate over a bain-marie or in the microwave, stirring until smooth. Prepare a flat tray or chopping board with a piece of greaseproof or baking parchment - something that will fit back in your fridge
Dip the squares of brownie into the chocolate, using a fork to turn the pieces making sure each side gets coated. Allow the excess chocolate to fall off then use another fork/skewer/cocktail stick to push the square off the fork and onto the tray with the greaseproof
If the chocolate is starting to set on the dipped pieces, sprinkle them with the optional cacao nibs and goji berries
Keep dipping until you've either used up all the chocolate or you have no squares left to dip! Refrigerate for 5-10 minutes till the chocolate is set.
Store in the fridge in an airtight container
Notes
I honestly can't say how long these last. I've made them 3 times now and each time they're mysteriously vanished from the fridge in just a couple of days! ?
Recipe by The Cook & Him at https://thecookandhim.com/recipes/raw-goji-brownie-bites/