Garlic-Herb Marinated Turkey Tenderloin

This marinated turkey tenderloin is simple to prepare and full of flavor. With just a few everyday ingredients you can make a tender, juicy main course that’s perfect for a family dinner or for slicing into sandwiches the next day.

When you want an easy, reliable main dish that still feels special, turkey tenderloins are a great choice. They cook relatively quickly compared to a whole turkey and absorb marinades beautifully. In this recipe, olive oil and apple cider vinegar form the base of a tangy-sweet marinade, maple syrup and Dijon mustard add depth and balance, fresh rosemary brings an herbaceous note, and garlic rounds everything out. The result is a flavorful, moist turkey that holds together well for slicing and serving.

Packages of turkey tenderloins from the supermarket commonly weigh around 1 1/2 pounds (24 ounces) and usually contain two tenderloin pieces. A single package typically feeds two people as a main course with side dishes, or four people if you slice the tenderloins thinly and serve smaller portions. Leftovers are terrific for sandwiches, salads, or wraps, so plan accordingly.

How to Make the Marinade

Start by combining the olive oil, apple cider vinegar, maple syrup, Dijon mustard, minced garlic, chopped rosemary, salt and pepper in a small bowl. Whisk until the mixture is smooth and well blended. The maple syrup adds a subtle sweetness that balances the vinegar, while the mustard helps emulsify the dressing and cling to the meat.

Place the turkey tenderloins in a resealable plastic bag or a shallow, oven-safe dish. Pour the marinade over the tenderloins and turn them so they are evenly coated. Seal the bag or cover the dish and refrigerate for at least 4 hours for best flavor; longer (up to overnight) is fine and will deepen the flavor further.

Baking the Tenderloins

When you are ready to cook, preheat the oven to 350°F (175°C) about 15 minutes before removing the tenderloins from the refrigerator. Transfer the marinated tenderloins to an oven-proof baking dish, discarding any leftover marinade. Bake the tenderloins for roughly 30–35 minutes, or until the thickest part of the meat reaches an internal temperature of 165°F (74°C) when measured with a meat thermometer.

Once the turkey reaches the proper temperature, remove it from the oven and let it rest at room temperature for 5–10 minutes. Resting allows the juices to redistribute, making the meat easier to slice and more tender when served. Slice the tenderloins across the grain into even portions and serve warm.

Serving Suggestions

This marinated turkey tenderloin pairs well with creamy potato sides, green vegetable dishes, and soft rolls or dinner bread. Leftover slices are ideal for sandwiches—combine with crisp lettuce, sliced tomato, a smear of mayonnaise or mustard, and your favorite cheese. The sweet-savory marinade complements hearty sides and bright, acidic relishes alike.

Instructions

1. In a small bowl, whisk together the olive oil, apple cider vinegar, maple syrup, Dijon mustard, minced garlic, chopped rosemary, salt and pepper.
2. Add the turkey tenderloins to a resealable plastic bag or shallow dish. Pour in the marinade and toss to coat. Seal the bag or cover the dish and refrigerate for at least 4 hours.
3. Preheat the oven to 350°F (175°C) about 15 minutes before cooking. Remove the tenderloins from the fridge, place them in an oven-proof baking dish, and discard any remaining marinade.
4. Bake 30–35 minutes, or until the internal temperature reaches 165°F (74°C). Remove from the oven and let rest for 5–10 minutes before slicing and serving.