Whisk eggs, mayonnaise, ketchup, spices, salt, and pepper until smooth. Add schnitzels, turning to coat. Cover with plastic wrap and chill for 1 hour (optional).
Combine coating ingredients on a baking sheet. Press each schnitzel firmly into the mixture to coat both sides.
Heat oil in a deep pot to 350°F/175°C. Fry schnitzels 1½–2 minutes per side until golden and crisp.
Transfer to a baking sheet for 5–10 minutes, then move to a wire rack to keep crisp.