This is not the brunch guide. Edinburgh has a brunch guide already, and it covers the sit-down, mid-morning, eggs-and-cocktails scene. This page is about breakfast: what you eat before your day starts. The Full Scottish fry-up you need before climbing Arthur's Seat. The bakery croissant you grab on your way to the National Museum. The quick sandwich that gets you from your accommodation to the first activity without wasting an hour in a queue.
Edinburgh's breakfast culture splits into three camps. There are the traditional Full Scottish places, where you get eggs, bacon, haggis, black pudding, tattie scones, and toast on a plate big enough to see you through until dinner. There are the bakeries, which Edinburgh does better than you'd expect from a city this far north (French patisseries, Asian bakeries, sourdough specialists). And there are the quick morning stops: sandwich shops, coffee boxes, and delis where the point is speed, not atmosphere.
This guide covers all three. If you're looking for the social brunch experience (weekend queues, creative benedicts, cocktails before noon), that's the brunch guide. If you want to know where to eat before 10am without booking a table, keep reading.