MD80 HAD A COFFEE MAKER EXPLODE INFLT IN ZFW CLASS A.

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SMOKE IN FORWARD GALLEY. DURING CLBOUT FL230; HEARD VERY LOUD BANG FOLLOWED BY ELECTRICAL BURNING ODOR. IMMEDIATELY GOT 4 CHIMES FROM FLT ATTENDANT #1. COFFEEMAKER IN FIRST CLASS GALLEY APPEARED TO HAVE HAD SOME SORT OF SHORT WHICH CAUSE THE BANG; THE SMOKE; AND ALSO CAUSED WHITE POWDER RESIDUE TO COVER THE COFFEEMAKER AND GALLEY SURFACE. WE TURNED OFF THE GALLEY PWR AND CHKED FOR POPPED CIRCUIT BREAKER. FO WENT TO GALLEY AND PULLED ALL CIRCUIT BREAKERS AFTER SECURING THE GALLEY. SMOKE SMELL IMMEDIATELY DISSIPATED AND FLT CONTINUED TO ZZZ UNEVENTFULLY AFTER PA WAS MADE TO PAX. UPON ARRIVING AT THE GATE IN ZZZ; FLT ATTENDANT EXPRESSED MUCH CONCERN ABOUT THE UNEXPLAINED WHITE POWDER. CAPT AND MAINT EXPLAINED TO THEM THAT THE POWDER CAME FROM A PIECE OF CERAMIC THAT EXPLODED. THIS WAS THE REASON FOR THE BANG; THE SMOKE AND THE POWDER. ASKED THAT ACR OPS PLEASE TEST THE WHITE SUBSTANCE AND RPT BACK THE FINDINGS. LEFT PHONE NUMBERS OF ALL CREW MEMBERS SO FOLLOW UP COULD BE ACCOMPLISHED. SEVERAL FLT ATTENDANTS EXPRESSED CONCERN AND SAID THEY WOULD GO TO COMPANY MEDICAL UPON RETURNING THAT AFTERNOON.