Braunschweig - Eat & drink
Eat
Mutter Habenicht 
At Papenstieg 3 in the town centre. Rustic pub-cum-restaurant. German/European cuisine. Outdoor tables in good weather. Menu as PDF in English here. 
Corvin's Burger & Beer
At Neue Str. 9, also in the town centre. American fast food in a pub/restaurant environment, with wood pannelled walls and chunky wooden tables. Reviews in English here on Tripadvisor.
Badsha 
At Ölschlägern 31 – 32, near the old palace. Family-run Indian restaurant in central Braunschweig since 2008. Some reviews in English on Tripadvisor here. 
 
If you have any other suggestions, I'm always interested in hearing about new places. Please let me know at: footballingermany@gmx.de
 
Drink
Wahre Liebe 
Restaurant/bar at the stadium itself. Closed Mondays. Open 4 hours before kick-off for pre-match drinks on match days. Google reviews auto-translated into English here. 
Erol's Place / Spektrum 
Rheingoldstr. 27, just to the side of the stadium. A matchday bar, very much geared to home fans. But I'm sure that neutrals are welcome too. See photo on my Eintracht Stadion gallery page. Indeed, that whole lane, the Rheingoldstrasse, becomes a pedestrianised area for pre-match and post-match drinks on match days.
Roots Sportsbar 
Sports bar situated fairly centrally in Braunshcweig, at Hintern Brüdern 27a. Pool tables. Big screens. Live football. Soups, baguettes, pasta and pizza. Beers, shorts, cocktails and hot drinks. Google reviews auto-translated into English here.
 
If you have any other suggestions, I'm always interested in hearing about new places. Please let me know at: footballingermany@gmx.de