Creamy Caramelized Onion Burgers with Butter Lettuce Salad
Great for Grilling

Creamy Caramelized Onion Burgers

with Butter Lettuce Salad

45 MIN
2 Servings
Wellness at Blue Apron
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Vegetarian
These recipes don’t contain meat, poultry, fish, or seafood.* They’re made with fruits and vegetables, grains, legumes, nuts, and seeds. *Select artisanal cheeses may contain animal-derived rennet.
Carb Conscious
These meals have 48g or less of net carbs (total carbs minus dietary fiber) per serving. They replace refined carbohydrates from sources like white flour, rice, and cane sugar with high-fiber foods like fresh vegetables, fruits, and whole grains.
600 Calories Or Less
Coming in at 600 calories or less per serving, these recipes are ideal for those choosing to monitor their caloric intake without sacrificing flavor. The US Food & Drug Administration uses 2000 calorie daily intake for general advice. The 600 calorie cap equates to 30% of the total 2000 calories per day based on 3 meals per day with 200 calories remaining for snack or beverage.
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These recipes feature grains such as barley, quinoa, farro, orzo, couscous and more, handpicked by our Culinary team in collaboration with our Registered Dietitian.
Pescatarian
These recipes feature a wide array of nutritious seafood options like salmon, cod, tilapia, crab, and shrimp. While these dishes never contain meat, pork or poultry, they may contain animal derived ingredients such as milk, butter, cheese and/or honey.
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From the Test Kitchen

A topping of sweet caramelized onion mixed with Worcestershire sauce and cooling crème fraîche gives these burgers an irresistibly umami (or savory) layer of flavor. The burgers find balance in a refreshing side salad that highlights crisp slices of apple.

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  • Nutrition
    PER SERVING
  • Calories
    780 Cals (est.)
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fresh
ingredients
Creamy Caramelized Onion Burgers with Butter Lettuce Salad
Title
time-saving
tips & techniques
Creamy Mustard Sauce
Apple
Butter Lettuce
Vegetarian Worcestershire Sauce
How To: Safely Cut Round Vegetables
Crème Fraîche
Panko Breadcrumbs
How To: Wash Lettuce
Apple Cider Vinegar
Potato Buns
step-by-step
instructions
Cook Along Triangle Created with Sketch.
Prepare the ingredients:
1 Prepare the ingredients:

If you’re grilling, preheat your grill to maintain a temperature of 450-500°F. Oil the grill grates. Wash and dry the fresh produce. Peel and thinly slice the onion. Halve the buns. Cut off and discard the root end of the lettuce; separate the leaves. Quarter and core the apple; thinly slice lengthwise. Combine in a large bowl. 

Caramelize the onion:
2 Caramelize the onion:

In a medium pan (nonstick, if you have one), heat a drizzle of olive oil on medium-high until hot. Add the sliced onion; season with salt and pepper. Cook, stirring occasionally, 7 to 9 minutes, or until lightly browned and slightly softened. Add the Worcestershire sauce (carefully, as the liquid may splatter) and crème fraîche. Cook, stirring frequently, 30 seconds to 1 minute, or until combined. Transfer to a bowl. Season with salt and pepper to taste. Cover with aluminum foil to keep warm. 

Form & cook the patties:
3 Form & cook the patties:

Place the beef and breadcrumbs in a bowl; season with salt and pepper. Gently mix to combine. Using your hands, form the mixture into two 1/2-inch-thick patties; transfer to a plate. 

STOVE: Rinse and wipe out the pan used to cook the onion. In the same pan, heat a drizzle of olive oil on medium-high until hot. Add the patties; cook 4 to 5 minutes per side (flipping carefully, as the oil may splatter), or until browned and cooked through.
GRILL: Lightly oil the patties. Grill 6 to 7 minutes per side, or until browned and cooked through. 

Transfer to a plate and cover with aluminum foil to keep warm. 

Make the salad:
4 Make the salad:

To make the dressing, in a bowl, combine the creamy mustard sauce and half the vinegar (you will have extra vinegar). Whisk in a drizzle of olive oil until thoroughly combined; season with salt and pepper. Just before serving, to the bowl of prepared lettuce and apple, add the peppers and enough of the dressing to coat (you may have extra dressing); season with salt and pepper. Toss to combine; season with salt and pepper to taste. 

Toast the buns & serve your dish:
5 Toast the buns & serve your dish:

STOVE: Wipe out the pan used to cook the patties. Add the buns, cut side down, and toast on medium-high, 30 seconds to 1 minute, or until lightly browned. Transfer to a work surface.
GRILL: Grill the buns, cut side down, 30 seconds to 1 minute, or until lightly browned. Transfer to a work surface.

Assemble the burgers using the toasted buns, cooked patties, and caramelized onion (you may have extra onion). Serve with the salad on the side. Enjoy! 

Tips from Home Chefs

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Creamy Caramelized Onion Burgers

Prepare the ingredients:
1 Prepare the ingredients:

If you’re grilling, preheat your grill to maintain a temperature of 450-500°F. Oil the grill grates. Wash and dry the fresh produce. Peel and thinly slice the onion. Halve the buns. Cut off and discard the root end of the lettuce; separate the leaves. Quarter and core the apple; thinly slice lengthwise. Combine in a large bowl. 

2 Caramelize the onion:

In a medium pan (nonstick, if you have one), heat a drizzle of olive oil on medium-high until hot. Add the sliced onion; season with salt and pepper. Cook, stirring occasionally, 7 to 9 minutes, or until lightly browned and slightly softened. Add the Worcestershire sauce (carefully, as the liquid may splatter) and crème fraîche. Cook, stirring frequently, 30 seconds to 1 minute, or until combined. Transfer to a bowl. Season with salt and pepper to taste. Cover with aluminum foil to keep warm. 

Caramelize the onion:
Form & cook the patties:
3 Form & cook the patties:

Place the beef and breadcrumbs in a bowl; season with salt and pepper. Gently mix to combine. Using your hands, form the mixture into two 1/2-inch-thick patties; transfer to a plate. 

STOVE: Rinse and wipe out the pan used to cook the onion. In the same pan, heat a drizzle of olive oil on medium-high until hot. Add the patties; cook 4 to 5 minutes per side (flipping carefully, as the oil may splatter), or until browned and cooked through.
GRILL: Lightly oil the patties. Grill 6 to 7 minutes per side, or until browned and cooked through. 

Transfer to a plate and cover with aluminum foil to keep warm. 

4 Make the salad:

To make the dressing, in a bowl, combine the creamy mustard sauce and half the vinegar (you will have extra vinegar). Whisk in a drizzle of olive oil until thoroughly combined; season with salt and pepper. Just before serving, to the bowl of prepared lettuce and apple, add the peppers and enough of the dressing to coat (you may have extra dressing); season with salt and pepper. Toss to combine; season with salt and pepper to taste. 

Make the salad:
Toast the buns & serve your dish:
5 Toast the buns & serve your dish:

STOVE: Wipe out the pan used to cook the patties. Add the buns, cut side down, and toast on medium-high, 30 seconds to 1 minute, or until lightly browned. Transfer to a work surface.
GRILL: Grill the buns, cut side down, 30 seconds to 1 minute, or until lightly browned. Transfer to a work surface.

Assemble the burgers using the toasted buns, cooked patties, and caramelized onion (you may have extra onion). Serve with the salad on the side. Enjoy! 

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