The chocolate itself is low in purines, but high sugar and refined flour can raise uric acid levels [1][2].
Good
The cocoa in chocolate chip cookies contains theobromine, which may mildly inhibit uric acid production [1]. A single small cookie occasionally is unlikely to trigger a flare for most people.
Bad
Each cookie typically contains 9–12g of added sugar, which is about 50% fructose and directly increases uric acid production [2]. Refined white flour also spikes blood sugar, potentially worsening hyperuricemia [2].