In a food processor, blend 1 cup of walnuts (or 2/3 of the total if altering) with the almonds until finely ground.
Add cacao powder and sea salt to the nut mixture, then pulse to combine.
Set aside.
Blend the dates until they form small bits, remove and set aside.
Return the nut-cacao mixture to the processor.
Gradually add small handfuls of date pieces, processing until a dough forms.
If it doesn’t hold together when squeezed, add more dates.
Press the dough into a parchment-lined 8x8 dish.
Mix in 1/2 cup chopped walnuts and cacao nibs before pressing flat.
Mix in 1/2 cup chopped walnuts and cacao nibs before pressing flat.
Chill in the freezer or fridge for 10-15 minutes.
Heat almond milk and pour over chocolate.
Let it sit for 2 minutes, then stir in melted coconut oil and a pinch of salt.
After cooling in the fridge for 10 minutes, whisk in powdered sugar until fluffy.
Frost the brownies and top with extra walnuts and cacao nibs.
Slice into 12 squares and enjoy!