Festival organizers can permit themselves a big smile of pride when a local ice cream chain confects a limited-edition flavor to celebrate their event. So the volunteers behind the free fourth annual JP Music Festival (JPMF) should be flashing some pretty wide grins this Saturday from noon to 7 p.m. at Pinebank Field near Jamaica Pond as thousands gather to sample 20 musical acts and a new dairy treat inspired by an old-time candy favorite.

J.P Licks describes its latest creation, Squirrel Nut Zipple, as “peanut butter ice cream with roasted salted peanuts and a buttery ripple.” Squirrel Nut Zippers are a vanilla-flavored nut caramel originally introduced by the Austin T. Merrill Company of Roxbury back in 1926, and made much more recently by NECCO in Cambridge. The JPMF logo features a white squirrel in a natty porkpie, a tip of the hat to the family of albino squirrels rumored to frolic among the pines of Pinebank Field. Music buffs will also pick up the reference to the 90’s band Squirrel Nut Zippers, known for their eclectic fusion of Delta blues, gypsy jazz, 1930s-era swing, and klezmer.

As in past years the slickly run JPMF will have a pair of side-by-side stages, seamlessly seguing back and forth, so fans don’t have to move from their lawn chairs and blankets.Though all performers, organizers, and techies volunteer their time and expertise, JPMF honchos had the painful but necessary task of turning away about 80 percent of the acts that would have liked to appear.

The festival showcases musicians, bands, group, or ensemble members who either live or work in Jamaica Plain. Though the event is overwhelmingly staffed by JPers, a few Dot residents managed to finesse the stringent residency requirements, including board of directors members David Mueller (Treasurer) and Justin McCarthy (Design).

But back to those swinging eclectic fusions mentioned earlier. The programming itself is truly wide-ranging, starting with Bethel A.M.E. Praise & Worship Team, the Boston Police Gaelic Column of Pipes & Drums, and Radiovolta (Latin pop/rock).

The closing acts of JPMF are more typical of free concerts: Stray Bullets “streetpunk reggae” and Streight Angular “psych/garage/pop neon explosion.”

A 70-minute playlist featuring all the 2014 artists can be heard on Soundcloud: soundcloud.com/jpmusicfestival.

This year, JP-based Samuel Adams brewery is donating use of a trolley to take residents to and from Pinebank Field before and during the festival with live acoustic music on-board. The trolley will make stops around JP and help decrease the need for parking near the concert site. The circular trolley is as follows : Stonybrook T station > JP Music Festival site > The Haven > Brendhan Behan Pub > Tres Gatos > Galway House/J.P. Licks/JP Seafood/Bukhara stop (bus stop across from Galway) > James’s Gate > Stonybrook T station.

The JP Music Festival is a registered 501(c)(3) non-profit corporation that holds music fundraisers and other events throughout the year. The festival began in 2011 and is organized by the acclaimed songwriter and musician Rick Berlin, Randace Moore, and Shamus Moynihan, promoter and booking agent for the Midway Café. Galway House is the founding sponsor.

The event on Facebook: facebook.com/events/261461284013483/