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June 13, 2026 · Recipe

Pan-Seared New York Strip with Peppercorn Demi-Glace, Truffle Mash and Almond Green Beans

This pan-seared New York strip dinner brings together the classic comforts of a steakhouse plate: a juicy steak, a glossy peppercorn pan sauce, creamy mashed potatoes, and crisp-tender green beans.

The potatoes get a subtle truffle oil finish, while the roasted green beans are tossed with almonds for crunch. It is a complete, satisfying dinner for two made with straightforward stovetop and oven techniques.

Ingredients

Almonds1 ounce almondsView ingredient guideBeef Demi-Glace1 unit beef demi-glaceView ingredient guideButter1 tablespoon butterView ingredient guideGreen Beans6 ounces green beansView ingredient guideNew York Strip Steak10 ounces New York strip steakView ingredient guideOlive Oil1 teaspoon olive oilView ingredient guideParsley1/4 ounce parsleyView ingredient guidePPepper, to tasteView ingredient guideSaltSalt, to tasteView ingredient guideShallot1 shallotView ingredient guideSour Cream4 tablespoons sour cream, dividedView ingredient guideTricolor Peppercorns1 tablespoon tricolor peppercornsView ingredient guideTruffle Oil2 tablespoons truffle oil, use 1/2 teaspoon or to tasteView ingredient guideV2 teaspoons vegetable oilView ingredient guideYukon Gold Potatoes16 ounces Yukon Gold potatoesView ingredient guide

Instructions

  1. Wash and dry the produce. Preheat the oven to 425°F. Peel the potatoes and cut them into 1/2-inch cubes.
  2. Place the potatoes in a medium pot with a pinch of salt and enough water to cover by 1 inch. Bring to a boil and cook until fork-tender, about 15 minutes. Drain, then return the potatoes to the empty pot.
  3. While the potatoes cook, trim the green beans. Coarsely crush the peppercorns with a mallet or heavy pan. Finely chop the parsley. Peel, halve, and chop the shallot.
  4. On a baking sheet, toss the green beans with the olive oil and a pinch each of salt and pepper. Roast until tender, 12 to 15 minutes.
  5. Heat the vegetable oil in a large pan over medium-high heat. Pat the steak dry with paper towels and season all over with salt and pepper.
  6. Add the steak to the hot pan and cook to your desired doneness, 3 to 6 minutes per side. Transfer to a plate to rest. Loosely tent with foil if you want to keep it warm.
  7. Reduce the heat under the pan to medium-low. Add a drizzle of oil if the pan looks dry, then add the shallot. Cook, tossing, until softened, 1 to 2 minutes.
  8. Stir in 1/4 teaspoon crushed peppercorns, using more or less to taste, along with the beef demi-glace and 1/2 cup water. Bring to a boil, then reduce the heat and simmer until slightly reduced, 2 to 3 minutes.
  9. Remove the sauce from the heat. Stir in the butter and half of the sour cream until the butter melts and the sauce is smooth. Season with salt and pepper.
  10. Add the remaining sour cream and 1/2 teaspoon truffle oil to the drained potatoes. Mash with a fork or potato masher until smooth. Season with salt and pepper. Add more truffle oil to taste if desired.
  11. Thinly slice the rested steak against the grain. Toss the roasted green beans with the almonds.
  12. Divide the mashed potatoes, almond green beans, and sliced steak between plates. Spoon the peppercorn demi-glace over the steak and potatoes, then garnish with parsley.

Useful Cookware

A few helpful kitchen tools for this recipe, with relevant Amazon picks for each item.

Peeler

OXO Good Grips Swivel PeelerOXO Good Grips Swivel PeelerView on AmazonSpring Chef Premium Swivel Vegetable Peeler, Soft Grip Handle and Ultra Sharp Stainless Steel Blades - Perfect Kitchen Peeler For Veggie, Fruit, Potato, Carrot, Apple - BlackSpring Chef Premium Swivel Vegetable Peeler, Soft Grip Handle and Ultra Sharp Stainless Steel Blades - Perfect Kitchen Peeler For Veggie, Fruit, Potato, Carrot, Apple - BlackView on AmazonOXO Good Grips Y-PeelerOXO Good Grips Y-PeelerView on Amazon

Medium pot

SENSARTE Nonstick Saucepan with Lid, 1.5 Quarts Small Pot with Swiss Granite Coating, Stay-cool Handle, Multipurpose Handy Sauce Pot Small Kitchen Cooking Pot, Induction Comptable, PFOA FreeSENSARTE Nonstick Saucepan with Lid, 1.5 Quarts Small Pot with Swiss Granite Coating, Stay-cool Handle, Multipurpose Handy Sauce Pot Small Kitchen Cooking Pot, Induction Comptable, PFOA FreeView on AmazonCuisinart 1.5 Quart Sauce Pan with Cover, Stainless Steel Pot with Lid, Small Kitchen Pots, Dishwasher Safe, Compatible with Induction, Electric, Gas Cooktops, Oven Safe Saucepan, Cool Grip HandlesCuisinart 1.5 Quart Sauce Pan with Cover, Stainless Steel Pot with Lid, Small Kitchen Pots, Dishwasher Safe, Compatible with Induction, Electric, Gas Cooktops, Oven Safe Saucepan, Cool Grip HandlesView on AmazonCAROTE 2QT & 2.5QT Sauce Pan Sets with Lid & Ladle Cooking Pots Nonstick Saucepans Cookware Set Small Kitchen Pot, Induction Comptable, Easy to Clean, PFOA FREE (Green)CAROTE 2QT & 2.5QT Sauce Pan Sets with Lid & Ladle Cooking Pots Nonstick Saucepans Cookware Set Small Kitchen Pot, Induction Comptable, Easy to Clean, PFOA FREE (Green)View on Amazon

Baking sheet

GoodCook Everyday Nonstick Baking Sheet Set, 3 Pack Includes Small (13×9) Medium (15×1) and Large (17×11) Pans Carbon Steel Construction Cookie Sheets Bakeware Set, GrayGoodCook Everyday Nonstick Baking Sheet Set, 3 Pack Includes Small (13×9) Medium (15×1) and Large (17×11) Pans Carbon Steel Construction Cookie Sheets Bakeware Set, GrayView on AmazonNutriChef 3-Piece Nonstick Kitchen Oven Baking Pans - Premium & Stylish Non-Stick Steel, Commercial Grade Restaurant Quality Metal Bakeware with Red Silicone Handles - Easy to Clean, NCSBS3SNutriChef 3-Piece Nonstick Kitchen Oven Baking Pans - Premium & Stylish Non-Stick Steel, Commercial Grade Restaurant Quality Metal Bakeware with Red Silicone Handles - Easy to Clean, NCSBS3SView on AmazonGoodCook Everyday Nonstick Steel Baking Sheet, 17 x 11-Inch, GrayGoodCook Everyday Nonstick Steel Baking Sheet, 17 x 11-Inch, GrayView on Amazon

Large pan

SENSARTE Nonstick Frying Pan Skillet with Lid, 12 Inch Large Deep Frying Pan, 5 Qt Non Stick Saute Pan with Cover, Induction Pan, Healthy Non Toxic Cooking Pan with Helper Handle, PFOA PFOS FreeSENSARTE Nonstick Frying Pan Skillet with Lid, 12 Inch Large Deep Frying Pan, 5 Qt Non Stick Saute Pan with Cover, Induction Pan, Healthy Non Toxic Cooking Pan with Helper Handle, PFOA PFOS FreeView on AmazonFarberware Dishwasher Safe Nonstick Jumbo Cooker Chef's Pan with Lid and Helper Handle, Kitchen Cookware, 6-Quart, BlackFarberware Dishwasher Safe Nonstick Jumbo Cooker Chef's Pan with Lid and Helper Handle, Kitchen Cookware, 6-Quart, BlackView on Amazon

Paper towels

Scott Paper Towels, Choose-A-Sheet, 6 Double Rolls = 12 Regular Rolls (108 Sheets Per Roll)Scott Paper Towels, Choose-A-Sheet, 6 Double Rolls = 12 Regular Rolls (108 Sheets Per Roll)View on AmazonAmazon Basics 2-Ply Flex-Sheets Paper Towels, 12 Basics Rolls = 40 Regular Rolls, Everyday Value with 150 Sheets per Roll, Packaging May VaryAmazon Basics 2-Ply Flex-Sheets Paper Towels, 12 Basics Rolls = 40 Regular Rolls, Everyday Value with 150 Sheets per Roll, Packaging May VaryView on AmazonSparkle Pick-A-Size Paper Towels, 6 Double Rolls (660 Sheets Total) - Strong 2-Ply Towels for Kitchen Cleanup and Everyday MessesSparkle Pick-A-Size Paper Towels, 6 Double Rolls (660 Sheets Total) - Strong 2-Ply Towels for Kitchen Cleanup and Everyday MessesView on Amazon

Potato masher or fork

KitchenAid Gourmet Stainless Steel Wire Masher, 10.24-Inch, BlackKitchenAid Gourmet Stainless Steel Wire Masher, 10.24-Inch, BlackView on AmazonMaclia 2PCS Mashed Potato Masher - Stainless Steel Potato Smasher, Masher Kitchen Tools & Utensils for Avocado, Bean, Salad, Vegetables, Fruit, Food, Meat Smasher Tool for Ground BeefMaclia 2PCS Mashed Potato Masher - Stainless Steel Potato Smasher, Masher Kitchen Tools & Utensils for Avocado, Bean, Salad, Vegetables, Fruit, Food, Meat Smasher Tool for Ground BeefView on AmazonCuisinart, Nylon Potato MasherCuisinart, Nylon Potato MasherView on Amazon

Aluminum foil

Reynolds Wrap Everyday Strength Aluminum Foil Roll, Freezer Safe and Grill Safe, Great for Foil Packets and Home Cooking, 12 Inches Wide, 200 Total Sq. Ft.Reynolds Wrap Everyday Strength Aluminum Foil Roll, Freezer Safe and Grill Safe, Great for Foil Packets and Home Cooking, 12 Inches Wide, 200 Total Sq. Ft.View on AmazonReynolds Wrap Everyday Strength Aluminum Foil Roll, Freezer Safe and Grill Safe, Great for Foil Packets and Home Cooking, 12 Inches Wide, 30 Total Sq. Ft.Reynolds Wrap Everyday Strength Aluminum Foil Roll, Freezer Safe and Grill Safe, Great for Foil Packets and Home Cooking, 12 Inches Wide, 30 Total Sq. Ft.View on AmazonReynolds Wrap Heavy Duty Aluminum Foil Roll, Thick Heavy Duty Foil for Added Strength and Durability, Secure Easy Open and Close Tab, 12 Inches Wide, 50 Sq. Ft.Reynolds Wrap Heavy Duty Aluminum Foil Roll, Thick Heavy Duty Foil for Added Strength and Durability, Secure Easy Open and Close Tab, 12 Inches Wide, 50 Sq. Ft.View on Amazon

Recipe Tips

Patting the steak dry helps it brown well in the pan instead of steaming.

Crush the peppercorns coarsely and start with 1/4 teaspoon in the sauce; add more only if you want a stronger peppercorn bite.

Let the steak rest before slicing so the juices settle back into the meat.

Slice the steak against the grain for a more tender bite.

Truffle oil can be potent, so begin with 1/2 teaspoon in the potatoes and adjust to taste.

FAQ

How long should I cook New York strip steak in a pan?

Cook the steak over medium-high heat for 3 to 6 minutes per side, depending on thickness and your preferred doneness.

Do I have to use all of the truffle oil?

No. The potatoes use 1/2 teaspoon truffle oil, with more added only to taste.

What goes into the peppercorn demi-glace sauce?

The sauce is made in the steak pan with shallot, crushed tricolor peppercorns, beef demi-glace, water, butter, and sour cream.

How do I make the green beans?

Toss the trimmed green beans with olive oil, salt, and pepper, then roast at 425°F for 12 to 15 minutes. After roasting, toss them with almonds.

How many servings does this recipe make?

This version makes 2 servings.