Time To Make The Donuts

The other day, I was speed walking through Bangkok pedestrians and vendors trying to get to a meeting on time. In a rush, I wasn't not paying close attention and tripped in an open gutter - as can happen easily on Bangkok's broken sidewalks. Once I had gathered myself, I looked up and saw this donut shop - called Daddy Dough with their motto - "The Secret Recipe Since 1985".

Having just tripped in the gutter, I was afraid to ask what that "Secret" may be.