Unfortunately mold is tough to battle in mulch without using fungicides. Cypress mulch is typically high in fungicides.
Call your county extension office. They may have some advise specific to your region.
I have on occasion poured a little grapefruit juice on mulch mold. The citrus acid has a dissolving effect. It may or may not work in your case but I thought it'd be worth a shot.

Here is a link that might be useful: The Little Green Apple

If possible, you should try to attach a picture of your problem here. There are several people who could ID it for you, perhaps soothing your concerns. You should know, by the way, that slime 'molds' come in all colors, including white. If you don't know how to attach images, I'd be happy to try to ID it, if you wish. Send pictures to my email.

Cypress mulch is not anymore disease or insect resistant than other mulches, though that myth is still broadcast by the cypress mulch industries. It is harvested from old stands of cypress forests, making it highly questionable on the environmental front. Cypress does not contain 'fungicides', but is naturally resistant to decomposition. That is not a good enough reason to use it as mulch.

Also, decomposing fungi are not affected by fungicides, per se. Those chemicals are manufactured to attack specific parasitic fungal organisms.

Diseases don't attack mulch.

You have one of the slime molds. And yes, they come in different colors. Also different forms.

No need to use fungicides against what's harmless. Slime molds come and go at regular intervals whenever conditions are suitable. After a while, it will disappear.

Thanks for the replies....My mulch is hemlock. I asked for the pure hemlock (not dyed) -- maybe this was not a good idea??? Is the dyed ones better?

I feel better knowing it is harmless as I have had such high longterm exposure to mold unknowingly that it made me sick but those were molds in the house. The last owner really did us in and concealed everything. We bought from "for sale by owner". Oh well, he died so maybe it made him sick too. However, we are the ones that spent over $30,000 on mold remediation to fix the problems he left. Good thing we had an equity loan but it did not cover everything and it took all our savings too. I am 70 and -- so much for having anything for retirement. Now you know why I am a bit paranoid about mold.

Thanks again and -- I don't even know how to email pictures but if it comes back (I shoveled it out) I will see if I can find someone to help with the pictures.

Whoops, forgot -- if it is under the window there is no need to worry about spores blowing in the window, correct? I was afraid to open it.....Paranoid me. I know there is mold everywhere and you bring it in on your clothes, shoes, etc...it is just what you can see now that gets me going.

Thanks again.

Slime mold is not a real mold in the true biological classification system. It is thought by many to be a protozoan not a mold. I does not form the type of spores a true mold does so you shouldn't have a problem. Most of the slime molds are not visible because most of them are in the lower leaf litter (lower moist areas of the forest floor or mulch interface). Cut down the moisture at the surface and you new found 'art work' will recede to lower moister levels. Sleep well.

long orange bannana like shoots with slimey mushroom like top that attract flies