@BowlOfRed hit on it solidly. The noodles are acting as waveguides, because of their size and shape. Where they meet, a contiguous surface is created, but with a much higher resistivity, as it's a narrow point contact.
Based on a table of refractive indexes and a table of frequency/wavelength, this effect would be especially effective when the total length of the joined area is at a resonance of the base wavelength of 3.54 inches (2.5ghz in air is 12cm, water is more refractive). So if they match in physical dimensions to 3.54 inches, 1.77 inches or 0.885 inches, the effect will channel a decent amount of energy. If that boundary between globules has a high resistance and carries a high amount of energy, it'll dissipate a lot of that energy as heat and light, potentially even creating plasma flashes as in the ideal natural example, the grapes mentioned by @BowlOfRed. Google "Grape Plasma," or just check out this video.
P.S. I don't know how big the Auntie Anne's shells are, but the curved concave shape is probably increasing their actual resonant size by something like 1.5 times. I'm not exactly sure how to work the formula on an irregular or non-ideal shape. Does that sound more like a match?
P.P.S. The YouTube dude captured some awesome shots of arrested plasma. He even talks some of the actual science of it. Trés magnifique!