Donut Fryers. is standard donut fryer range gives donut makers the flexibility needed to make any variety of donut, whether it's a traditional glazed ring, or a custom made signature product. fitted with an over-temperature sensor should your oil level drop below the required minimum.Designed specifically to fry donuts, these units have a large, shallow vat. Like funnel cake fryers, donut fryers have flat bottoms that work best with the wet batter and dough used to..