Stirring the Pot

Chunks and grains swirl round and round. They form a muddy mass.
I keep my paddle churning them as I turn on the gas.
As all the chunks and  bits melt down, the volume now decreases.
I watch the whole mess carefully. My vigilance increases.
I see it all congealing—an oily inky sludge
that after lengthy stirring finally turns to fudge!
This horrid, bubbling, lumpy goo that appeared so pernicious,
in the end turns into something creamy, rich, delicious.

For FOWC the prompt is “Decrease.”