Brand new DIYer here. In fact, this is the first recipe I've tried. It is fantastic most of the time but for some reason I get a peppery taste at times. Did I do something wrong?
See if any of these apply:
Does it tend to happen with a freshly-charged battery? Too much power can make creams and white chocolate scorch, especially if you take a big puff. If this is the problem, you could swap to a partly-drained battery, dial down the power if you have a variable-voltage battery, or use higher ohm heads instead of low-resistance (whichever applies to the equipment you use). This is the most likely cause.
Is it mostly with a brand-new cartomizer/
tank/head? Those ought to be rinsed well in hot water before the first use - or they'll sometimes add a bad taste until you've vaped with it a while.
Have you tried
vaping your nic base without flavoring? Some nic base has a peppery bite that comes
through when you least want it.
Is it with one particular batch? It could be you mixed with a bit too much flavoring. If so you can add a little more plain nic base to dilute it some. I doubt this is it, but I'll throw it out there as one other potential cause.