1st coat of mud
Where the fireplace brick meets the drywall along the sides, there was a wedged cavity that had to be filled in make a single vertical corner here. To built up this cavity I first used QuickCrete to give a good solid base and fill the void. Next I continued the build up with some quick setting plaster. Once it was close I finished off with some spackle to form the finished corner in line with the seems above the fireplace where drywall meets drywall.