Dinner · Part 2 of 3: Instructions
Sheet Pan Brown Butter Sage Pork Tenderloin with Apples Step-by-step instructions

- Prep
- Cook
- Total
- Serves
- 4
Before you start
Before beginning, ensure all produce is washed and thoroughly dried to promote better roasting. Peel the sweet potatoes and cut them into uniform one-inch cubes to ensure even cooking. Core and wedge the apples into pieces similar in size to the sweet potato cubes.
Slice the pork tenderloin into consistent medallions, approximately one inch thick. Preheat the oven to 400°F (200°C) at least twenty minutes in advance to ensure the oven reaches the correct temperature.
Prepare the workspace by clearing sufficient room for the sheet pan and having all ingredients measured and ready to use.
Ingredients at a glance (6)
- 1 1/2 lb pork tenderloin, sliced into medallions
- 2 cups sweet potatoes, cubed
- 2 cups red apples, wedged
- 4 tbsp unsalted butter
- 1 tbsp fresh sage, chopped
- 1 tsp coarse salt
Instructions
Pan Preparation
- Prepare the IngredientsPreheat the oven to 400°F (200°C). Line a rimmed sheet pan with parchment paper. Arrange the pork tenderloin medallions, sweet potato cubes, and apple wedges in a single even layer across the prepared pan, ensuring they are not overcrowded to promote proper roasting.Look for The pan should be evenly filled without overlapping the ingredients.Tip Cut the potatoes into uniform one-inch cubes to ensure they cook at the same rate as the pork.
The pork, sweet potatoes, and apples are arranged in a single, even layer on the parchment-lined sheet pan. Every piece is positioned to allow for maximum contact with the pan, ensuring uniform heat distribution. The prep area is clear, and the oven is preheated to the correct temperature, ready for the roasting phase.
Butter Browning
- Prepare the Brown ButterIn a small saucepan over medium heat, melt the butter. Continue cooking, swirling the pan occasionally, until the butter turns a nutty amber color and emits a fragrant, toasted aroma. Remove from heat immediately to prevent burning.Look for The butter smells nutty and has developed small brown flecks at the bottom.Tip Watch the butter closely during the last minute as it can transition from browned to burnt very quickly.
The butter has reached a deep amber color and exhibits a nutty, toasted scent. It contains small, golden-brown flecks at the bottom of the saucepan. The butter has been removed from the heat at the precise moment of browning to prevent the milk solids from turning bitter or burnt.
Roasting and Finishing
- Season and RoastDrizzle the browned butter evenly over the pork, potatoes, and apples. Sprinkle the chopped sage and coarse salt over the entire pan. Bake in the preheated oven until the pork reaches an internal temperature of 145°F (63°C). Remove from the oven and let the pork rest for at least 3 minutes before serving.Look for The pork should be golden-tan on the outside and opaque pale inside, while the potatoes are tender.Safe temperature 145°F (63°C) internal temperature (steaks, chops and roasts)Tip Use a digital meat thermometer inserted into the thickest medallion to confirm doneness accurately.
The pork has reached the safe internal temperature of 145°F (63°C) and has been allowed to rest for 3 minutes. The vegetables and fruit are tender and fragrant, with the butter and sage infusion coating the ingredients. The dish is ready to be plated and served while warm.
Common mistakes
Avoid overcrowding the sheet pan, as this causes the ingredients to steam rather than roast, preventing the desired browning and caramelization. Do not slice the pork too thin, or it may dry out during the roasting process.
Be cautious when browning the butter; it can transition from perfect to burnt in seconds. If the butter turns dark brown or black, discard and start over, as the bitter flavor will ruin the entire dish. Ensure the oven is fully preheated before inserting the pan to guarantee accurate cooking times.
How to tell it’s done
The pork tenderloin is cooked through when it reaches an internal temperature of 145°F (63°C). At this point, the meat should be opaque and pale throughout, with a light golden-tan exterior from the oven heat.
The sweet potatoes should be fork-tender and slightly caramelized, while the apple wedges should be soft but still hold their shape. Always use a digital meat thermometer inserted into the center of the thickest medallion to confirm the internal temperature safely before removing the pan from the oven.
- Steaks, chops and roasts: 145°F (63°C) in the thickest part, then a 3-minute rest
Up next · Part 3 of 3
2 variations · storage & make-ahead · 3 answers · printable card
Tips, FAQ & printable recipe (Part 3)← Back to the ingredients (Part 1)