Add ground beef and beer or water to the Instant Pot. If your ground beef is not frozen you can cut back to 3/4 cup beer or water. Cook on max pressure for 14 (10 minutes for non-frozen beef) minutes or high pressure for 15 minutes (11 minutes for non-frozen beef) and quick release. Add onions, spices, brown sugar, beef base and dried bell peppers (basically, everything with the exception of ketchup and mustard) and mix and chop up ground beef. Cook on max pressure 2 minutes or high pressure 3 minutes and quick release. If beef is still pink you may have to add more time by the minute. If the mixture is too wet, cook on the saute function for a few minutes to reduce the liquid. Add ketchup and mustard and mix. Serve on a bun.