Here is the full list of all 35 I Am Bread trophies - there are 20 bronze, 9 silver, 5 gold and 1 platinum.
Stay airborne for over 5 seconds on any mode except Zero Gravity
Finish a Story level with exactly 1% edibility
Spill the salt
Become inedible.
Stand upright on the skateboard and ride it for 1m or more as the Wholemeal bread
Obtain all other Trophies
Get an A++ on a Story level
Get an A++ on a Cheese Hunt level
Get an A++ on a Rampage level
Get an A++ on a Bagel Race level
Get an A++ on a Zero Gravity level
Complete all Story Levels (Before Epilogue)
Complete all Cheese Hunt Levels
Complete all Rampage Levels
Complete all Bagel Levels
Complete all Zero G Levels
A++ all Story levels
A++ all Rampage levels
A++ all Cheese Hunt levels
A++ all Zero G levels
A++ all Bagel races
Launch the Rocket
Break the TV
Use the Hairdryer
Start the Chainsaw
Start the Lawnmower
Start the car
Finish a Cheese Hunt level with 100% integrity
Finish a Story level with 100% edibility. No Marmalade allowed.
Finish a Zero G level using less than 100 fuel
Finish a Story level using Magic Marmalade
Finish a Story level with both sides covered in jam (jelly)
Climb atop the Garbage Truck on Story Mode
Use more than one heat source to toast yourself in a single Story run.
Completely cover yourself in butter and get toasted!