Making graphene "bread": A leavening strategy – involving hydrazine vapor – is used to prepare reduced graphene oxide (rGO) foams with porous and continuously cross-linked structures from freestanding compact GO layered films. Such rGO foams perform excellently as flexible electrode materials for supercapacitors and selective organic absorbents. Detailed facts of importance to specialist readers are published as "Supporting Information". Such documents are peer-reviewed, but not copy-edited or typeset. They are made available as submitted by the authors. Please note: The publisher is not responsible for the content or functionality of any supporting information supplied by the authors. Any queries (other than missing content) should be directed to the corresponding author for the article.