Place 1 cup walnuts (as original recipe is written // use 2/3 of the total if altering batch size) and the almonds in food processor and process until finely ground.
Transfer back to dish and place in freezer or fridge to chill for 10-15 minutes before cutting into 12 (amount as original recipe is written // adjust if altering batch size) even squares (If adding ganache, slice afterwards!).
Frost brownies generously with frosting and then top with additional raw walnuts and cacao nibs (optional). Slice into 12 even squares (amount as original recipe is written // adjust if altering batch size).
*Brownies adapted from my 5-minute Vegan Espresso Brownies.
*Nutrition information is a rough estimate calculated with ganache.