smidginsmid‧gin, smidgen /ˈsmɪdʒɪn/ (also smidge /smɪdʒ/) noun [singular] 
informal a very small amount of something SYN touchsmidgin of
I added just a smidgin of chilli sauce.
informal a very small amount of something SYN touchsmidgin of I added just a smidgin of chilli sauce.