Line the 8 x 8-inch dish with parchment, leaving enough overhang on two sides to lift out the chilled fudge.
Add all 3 cups shredded coconut to the food processor. Process for 10 to 15 minutes, stopping every few minutes to scrape the sides and bottom. Continue until the dry flakes become a smooth, thick coconut butter with no crumbly pockets.
Transfer all of the coconut butter to a mixing bowl. Stir in the full 1/2 cup cocoa, 6 tablespoons raw honey, 1 teaspoon homemade vanilla, and 1/2 teaspoon mineral salt until the color is even.
Scrape the thick mixture into the lined dish and press it into one level layer.
Refrigerate for 2 hours, until firm. Lift out the slab by its parchment, peel the paper away, and cut four rows by four rows for 16 pieces.
If using prepared almonds, press one into the top of each cut square.