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Cowboy Butter Beef Tenderloin with Roasted Asparagus, Fingerling, & Portobello Jumble

Recipe Development Team
Recipe Development TeamUpdated on October 30, 2025
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Calories
920 kcal
Protein
38g protein
Total
35 minutes
Difficulty
Medium
Allergens:
  • Milk
Produced in a facility that processes eggs, milk, fish, peanuts, sesame, shellfish, soy, tree nuts, and wheat.
Serving amount

6 ounce

Asparagus

10 ounce

Beef Tenderloin Steak

1 unit

Lemon

¼ teaspoon

Dried Thyme

¼ ounce

Chives

12 ounce

Fingerling Potatoes

¾ teaspoon

Smoked Paprika

½ tablespoon

Bold & Savory Steak Spice

½ tablespoon

Worcestershire Sauce

2 unit

Portobello Mushrooms

2 teaspoon

Dijon Mustard

1 teaspoon

Garlic Powder

Not included in your delivery

1 tablespoon (tbsp)

Cooking Oil

8 tablespoon (tbsp)

Butter

(Contains: Milk)

/ per serving
Calories920 kcal
Fat67 g
Saturated Fat34 g
Carbohydrate44 g
Sugar7 g
Dietary Fiber8 g
Protein38 g
Cholesterol210 mg
Sodium330 mg
Trans Fat2 g
Potassium1760 mg
Calcium90 mg
Iron7.8 mg
Due to the different suppliers we purchase our products from, nutritional facts per meal can vary from the website to what is received in the delivered box, depending on your region.

Cooking Steps

1
  • Adjust rack to top position and preheat oven to 450 degrees. Wash and dry produce.

  • Trim and discard woody bottom ends from asparagus; cut on a diagonal into 1-inch-long pieces. Halve portobellos; slice crosswise into 1/2-inch-thick slices. Halve potatoes.

2
  • Toss potatoes on a baking sheet with a drizzle of oil, salt, and pepper. Roast on top rack for 10 minutes.

  • Meanwhile, toss together asparagus, portobellos, a drizzle of oil, salt, and pepper in a medium mixing bowl.

  • After potatoes have roasted 10 minutes, add asparagus and portobellos to baking sheet. Continue to roast until veggies are browned and tender, 10-15 minutes.

3
  • While veggies roast, thinly slice half the chives; cut remainder into 1-inch pieces. Quarter lemon.

  • Dice 8 TBSP butter (there will be leftover cowboy butter from this recipe to enjoy again later!) into small pieces and add to a medium, microwave-safe bowl. Microwave in 5 second bursts until softened but not melted (this is important in order to keep the cowboy butter smooth and silky so do not rush this step!). Whisk in mustard, garlic powder, thinly sliced chives, 1/4 tsp thyme, 3/4 tsp smoked paprika, half the worcestershire sauce, salt (we used 1/2 tsp), and pepper (1/2 tsp thyme, 1 1/2 tsp smoked paprika, and all the worcestershire sauce for 4) until smooth.

4
  • Pat steaks dry with paper towels and season all over with salt, pepper, and half the steak seasoning (all for 4).

  • Heat a drizzle of oil in a large pan over medium-high heat. Add steaks and cook to desired doneness, 4-7 minutes per side (lower heat if steaks are browning too quickly). Transfer to a plate to rest and top with a dollop of cowboy butter.

5
  • Once veggies are done, stir in 1 TBSP cowboy butter (2 TBSP for 4) and a squeeze of lemon.

6
  • Slice steaks crosswise.

  • Divide steaks and jumble between plates. Top steaks with as much cowboy butter as you like and top jumble with large chive pieces. Serve with any remaining lemon wedges and remaining butter on the side.

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