(Megan Kennelly, KSU Plant Pathology)
Hmm, did a Country Stampeder camp at my house and, uh, regurgitate some beer?
No, this is just some slime mold activity. Slime molds are primitive organisms that feed on organic matter. They are not fungi, and they don’t feed on plants. There are lots of different kinds. Here is a slime mold in turf:
If it’s bothersome, you can scoop it out of the mulch with a shovel, or brush it off the turf with a rake. You might continue to see more growth, though, especially in humid conditions.