When I think "treat" I think of either cat treats or Halloween, and I didn't feel like drawing a cat, so here's a ghost enjoying a nice Halloween chocolate bar.
First I did a tiny thumbnail in my sketchbook
Then a sketch in Krita (my art program)
Then some lines
Then slightly different lines (This is the final line layer that I saved when finished, which is why my initials are there)
Then paint, for the final again. My monitor is weird and things tend to look very different if I paint on a white background, so having a background color helps with that a bit.