The flavors are (left to right) apple, red raspberry (minus the box I bought), and custard.
When I was at checkout, the round face of the blond lady cashier just lit up when she saw them. "Oh! Paczki!" she exclaimed, with a Slavic accent. She turned to the young man who was the bagboy. "Do you know what these are?"
The bagboy shook his head, baffled by the unfamiliar word.
"The best jelly donuts in the world!" I told him.
"That's right!" the cashier said proudly. She turned to me. "You enjoy these, dear!"
I grinned, thanked her, and assured her that I would.