The Iowa pork tenderloin sandwich is a Midwest icon: a thin, pounded pork loin cutlet, breaded and fried until golden, then served on a soft bun with pickles, onion, and mustard. What makes it truly Iowa-style is the size—the meat extends far beyond the bun, often by several inches on every side. The thin cutlet stays juicy inside while the crust turns shatteringly crisp, and the simple toppings let the pork shine. This recipe delivers that classic roadside diner experience at home, with a reliable method for a tender, flavorful cutlet every time.
Ingredients
- 1 lb (450 g) pork tenderloin, trimmed of silver skin
- 1 cup (240 ml) buttermilk (or 1 cup milk + 1 tbsp lemon juice, rested 5 min)
- 1 large egg
- 1 cup (125 g) all-purpose flour
- 1 tsp (5 g) garlic powder
- 1 tsp (5 g) onion powder
- 1 tsp (5 g) smoked paprika
- 1/2 tsp (2 g) cayenne pepper (optional, for heat)
- 1 tsp (5 g) salt, plus more for seasoning
- 1/2 tsp (2 g) black pepper, plus more for seasoning
- 2 cups (200 g) plain breadcrumbs (or crushed saltine crackers for extra crunch)
- Vegetable or canola oil, for frying (about 2 cups / 480 ml)
- 4 soft hamburger buns (or brioche buns)
- For serving: dill pickle slices, thinly sliced white onion, yellow mustard or ketchup
Instructions
- Slice the pork tenderloin crosswise into 4 equal pieces, each about 1 to 1½ inches (2.5–4 cm) thick. Place each piece between two sheets of plastic wrap or parchment paper. Using a meat mallet or rolling pin, pound each piece to an even thickness of about ¼ inch (6 mm). The cutlets will be large—that’s exactly what you want. Season both sides with salt and pepper.
- In a shallow bowl, whisk together the buttermilk and egg. In another shallow bowl, combine the flour, garlic powder, onion powder, smoked paprika, cayenne (if using), 1 tsp salt, and 1/2 tsp black pepper. Place the breadcrumbs in a third shallow bowl.
- Dredge each cutlet first in the flour mixture, shaking off excess. Dip into the buttermilk-egg mixture, letting the excess drip off. Then press into the breadcrumbs, coating both sides thoroughly. Place the breaded cutlets on a wire rack and let them rest for 10 minutes while you heat the oil. This helps the coating adhere.
- Pour about 1 inch (2.5 cm) of oil into a large, heavy skillet (cast iron works great). Heat over medium-high until the oil reaches 350°F (175°C). If you don’t have a thermometer, a pinch of flour dropped in should sizzle immediately.
- Fry the cutlets in batches, without crowding, for 2–3 minutes per side, until golden brown and cooked through. The internal temperature should reach 145°F (63°C) as the safe minimum for whole cuts of pork, checked with a food thermometer. Transfer to a wire rack or paper towels to drain. Repeat with remaining cutlets.
- Toast the buns lightly in the same skillet or on a griddle until golden. Spread mustard on the bottom bun, place the fried cutlet on top (it will hang over the edges), and add pickles and onion slices. Top with the other bun half. Serve immediately.
Tips
- Pounding is key: The cutlet should be thin and even—about ¼ inch (6 mm). If it’s thicker in the center, it will cook unevenly. Use a mallet’s flat side to avoid tearing the meat.
- Let the breading rest: After breading, letting the cutlets sit for 10 minutes allows the coating to set, preventing it from falling off during frying.
- Oil temperature matters: If the oil is too hot, the crust burns before the pork cooks; too cool, and the coating absorbs oil and gets greasy. Keep it at 350°F (175°C) and adjust the heat between batches.
- Don’t skip the thermometer: Pork tenderloin is lean and can dry out quickly. Use a food thermometer to pull it at 145°F (63°C) for juicy results.
Serving Suggestions
Serve the sandwich with classic sides like crinkle-cut fries, coleslaw, or a simple potato salad. For a true Iowa experience, add a side of pickled jalapeños or a dill spear. A cold glass of sweet tea or a local lager (for adults of legal drinking age, please drink responsibly) rounds out the meal.
Variations
- Spicy version: Add 1–2 tsp of hot sauce to the buttermilk-egg mixture and increase the cayenne to 1 tsp.
- Crunchier coating: Replace half the breadcrumbs with crushed cornflakes or saltine crackers for extra texture.
- Grilled option: For a lighter take, skip the breading and fry, and instead grill the pounded pork over high heat for 1–2 minutes per side, seasoning with salt, pepper, and a little paprika. The internal temperature should still reach 145°F (63°C).
- Different toppings: Try lettuce and tomato, or a slice of American cheese melted over the hot cutlet.
Storage and Reheating
Store leftover fried cutlets (separate from the buns) in an airtight container in the refrigerator for up to 3 days. To reheat, place on a wire rack in a 350°F (175°C) oven for 8–10 minutes, or until hot and crispy. Avoid microwaving, as it will make the coating soggy. If you have extra breading, it can be frozen raw for up to 2 months; thaw in the fridge before frying.
Frequently Asked Questions
Can I use pork loin instead of tenderloin? Yes, pork loin works, but it’s leaner and can be tougher. Slice it thinly and pound as directed. You may need to cook it slightly longer, but still pull at 145°F (63°C).
Why is my breading falling off? Often it’s because the cutlet wasn’t dry enough before flouring, or the oil wasn’t hot enough. Pat the pork dry with paper towels first, and make sure the oil is at 350°F (175°C). Also, letting the breaded cutlets rest for 10 minutes before frying helps.
Can I bake these instead of frying? Yes, but they won’t be as crispy. Place breaded cutlets on a wire rack over a baking sheet, brush lightly with oil, and bake at 425°F (220°C) for 12–15 minutes, flipping halfway, until golden and cooked to 145°F (63°C).
How do I make the cutlets extra large? The size comes from pounding thin. Start with a thicker slice of tenderloin and pound it out to a large, thin oval. You can also gently stretch the meat with your fingers as you pound.
What’s the best oil for frying? Use a neutral oil with a high smoke point, like vegetable, canola, or peanut oil. These won’t impart off-flavors and can handle the heat.
Can I prepare these ahead of time? Yes, bread the cutlets and refrigerate them on a wire rack for up to 4 hours before frying. This actually helps the coating set. Do not fry ahead and reheat, as they’ll lose crispness.
Related
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Safety notes: safe minimum internal temperatures from USDA FSIS; raw and undercooked fish guidance from the U.S. FDA. Food safety notes
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