Popin' Cookin', by Japanese company Kracie, is a toy set that lets you make mini, edible versions of foods like sushi, cupcakes, burgers, ramen and donuts (they don't taste like the real thing). You can find videos on YouTube showing many of their products and how they're used. I recently tried their Donut Set.
In total, we made 11 donuts. You may be wondering how they taste. I didn't like them that much. They felt like gummy sweets, and the taste was odd. Maybe if you don't think of them as donuts, they'll seem better.