Preheat the oven to 350ºF. Line an 8" square baking dish with parchment paper or grease well with butter so the brownies don't stick.
To a large bowl, add the coconut sugar, softened butter, coconut milk, egg, and vanilla, and stir until just combined.
In a separate bowl, mix the almond flour, cocoa powder, baking powder, and salt. Add to the wet ingredients and stir just until no flour remains.
Add the chocolate chips and chopped nuts if using, and stir. Transfer the mixture to the prepared baking dish and top with a few extra chocolate chips and chopped nuts.
Bake for 30 to 35 minutes or until crisp around the edges and a toothpick inserted to the center comes out clean.
Allow to cool in the pan before slicing into squares and serving. Store leftovers in the refrigerator.