Muling or Mulling: How To spell?

The word Muling is misspelled against Mulling, which is present continuous of "Mull"

Mulling has double "ll" is mispronounced as "l"
Remember double 'LL' in between the strings mu & ing which should not be misspelled with single 'L'
Wrong Spelling:  mu-l-ing 
Correct Spelling:  mu-ll-ing 
Check more misspelled words of Mulling to spell it correct.