Martha called for 1/2 c. sour cream, but when I found pasta from last week’s dinner in the tub of Daisy, I had to improvise. Although not explicitly recommended anywhere online, I substituted 1/2 c. of a ricotta cheese/heavy whipping cream (blended to about the consistency of sour cream). The texture of the cupcakes didn’t suffer. And although I can’t causally make this conclusion without having used sour cream also, I would say they were probably creamier than they would have been otherwise, which I find a plus.
The frosting, although delicious on its own, overpowered the cupcakes a bit. I’m not sure what would be the best way to fix this, except use less frosting. A filling was suggested, but I’m not sure that would neutralize the sweetness of the frosting any, if only to make the cupcakes even sweeter. Without frosting, they resemble banana muffins, except a little smoother and less grainy texture-wise.