Preheat the oven to 350° F. Line 16 muffin tins with paper liners.In a blender, blend the zucchini until very mashed. Scrape the sides down. Add the remaining ingredients in the order listed. Blend to fully combine, being careful not to over-blend. Fold in the chocolate chips.Divide the batter among the prepared muffin tins. Bake for 18-20 minutes, until just set. Serve with peanut butter and sea salt (if desired) on top.