This cookbook represents the processes and results of +CityxChange, where we all contribute with our own recipes & flavours. Just as in real life, recipes often need adjustment to taste. There is no single way to build a PED, so these recipes from our cities provide guidance through the complexities of the journey and share key information that help initiate and smoothen the processes. This publication captured insights from the 5-year +CityxChange EU Horizon project, focusing on designing Positive Energy Districts (PEDs) in smart sustainable cities. Designed and shaped as a cookbook, it serves as a guide with recipes and ingredients for fostering successful Positive Energy Districts.