48mg eliquid isn't really meant for vaping. Tasty Vapor even says that the 48mg is for diluting. It could be that with the nicotine at that level, you aren't going to be able to 'fix' the flavor. But, if you decide to vape at this level, possibly adding more sweetener could help.
ETA: Here's what Tasty Vapor says on their Tastyfinger ordering page:
Available Options:
Strength :
Which nicotine level would you like to choose? 12mg for a light smoker, 24mg for moderate, 36mg for heavy and 48mg is for mixing down with our Doubler products. Vaping 48mg liquid is not recommended.
PG/VG mix :
This is used as a guide. The end mix will depend on the flavors you choose (if available) and the mg strength (if applicable)
Add Sweetener? :
We don't sweeten your liquid unless you ask. So if what you're ordering is a liquid you expect to be sweet, then choose to sweeten your liquid.
Description
Just doesn't seem like much of a description is necessary here. Many have proclaimed it tastes just like the real thing. But see for yourself! Mixed fresh per order and just a touch of VG to increase vapor production. Fantastic flavor, nice throat hit and clouds of vapor. Smoking was never this great! More VG is available upon request at checkout. See below for available ratios.
**Sweetener Recommended**