The Waffle Nazi is one of many competitors in the annual Papen County Comfort Food Cook-Off seen in "Comfort Food". Despite his thick accent, he is not from Germany, or any German speaking country. He is American and simply speaks with an accent as part of his persona.
He is first seen after Ned discovers maple syrup in his sabotaged kitchen space. While he and Olive investigate Der Waffle Iron's kitchen for clues, the Waffle Nazi returns with Marianne Marie Beetle and accuses the Pie Holers of sabotage, revealing severed waffle iron cords.