I was going to buy this yesterday but put it down because I could imagine how it would taste.
In the end I got it the next day since I have already wasted money on some stuff that didn't taste good so it wouldn't hurt to buy something that cost less.
Basically, Santa's belt is a huge, long donut sliced horizontally filled with cream with jam on the top looking like an eclair.
Although it looks big, I felt that it was like two cream donuts made into one because I already ate half the belt.
Overall, it tasted how I imagined it to be as it was the same as the regular asda cream donuts but presented in a different way.
At the base of the donut edges, there is weirdly some chocolate sauce that keeps the donut in place which does make it slightly tastier with some chocolate.