Secrets to a moist/dense cupcake?

[t325t]

So what is everyone's secret to making a dense and moist cupcake that seems to be the norm at all these boutique bakeries?

Seems like most recipes create a lighter/fluffier cupcake that is comparable to what comes out of a box.

Is it more butter? Oil? Ideas and tips please!

[dmenifee]

I Use Butter To Get It Moist! Oil Seems To Give It An Oily Taste!

[CupcakeLuv]

Sour cream!

[BakingMad]

Recipes containing buttercream give very moist cakes.

My tip is to make a sugar syrup (equal parts water and caster sugar heated til thr sugar dissolves). When your cakes are almost cool, prick the tops with a cocktail stick and brush the syrup over. Keeps them really moist, and you can
flavour the syrup too.