Jam e-liquid comes in a variety of different guises from the humble strawberry jam to a delicious raspberry jam, these have flavour in abundance, and while being great as stand-alone flavours they come into their own when united with others, the addition of pastries and doughnuts are a mega combination while light airy sponge notes create great dessert e-liquids that blend well too. Peanut butter is also a must, the bold flavours blend well together creating a sweet and rich flavour that's well-balanced.
At Rainbowvapes we created one of the first jam-on-toast e-liquids, upon vaping the first prototype we were shocked by the way the sweetness of the strawberry jam came across with the slightly overdone toast behind it. Many e-liquid brands have replicated the same taste too.
The liquids come in a variety of strengths as well as viscosities, some are best suited to smaller pens and pods with lower outputs, whereas others with higher VG are suited to a larger sub-ohm setup.