What was found
AIRCRAFT WAS GROUNDED: AN EMERGENCY WAS DECLARED AND THE AIRCRAFT RETURNED TO PHL DUE TO THE FLIGHT CREW REPORTING THAT WHILE CLIMBING THRU THE UPPER TEENS THE FLIGHT ATTENDANTS REPORTED A SMELL THAT RESEMBLED AN OVEN OR ELECTRICAL SMELL. THE AIRCRAFT LANDED SAFELY AT PHL WITHOUT FURTHER INCIDENT. MAINTENANCE REPORTED THAT THE CREW DEBRIEF INDICATED SMELL OF BURNING FOOD LIKELY, NO FUEL / OIL SMELLS, APU OFF CREW SOF REPORT INDICATED SIMILARLY. MAINTENANCE PERFORMED TASK CARD SMOKE / ODOR / FUME TROUBLESHOOTING TASK CARD 26L00021001 AND THE ONLY EVIDENCE OF ODOR EMANATED FROM THE FORWARD GALLEY NR 1 OVEN, MAINTENANCE FOUND BURNT RESIDUE ON OVEN RACK, REMOVED RACKS AND CLEANED INTERIOR OF OVEN.