BBQ Beef Burgers with Caramelized Onions

Name: BBQ Beef Burgers with Caramelized Onions
Prep time: 15 min
Cook time: 35 min
Total time: 50 min
Yield: 4 servings
Cuisine: American
Ingredients: 1½ lb (680 g) Ground beef (80/20 blend), cold; 1 tsp (6 g) Kosher salt; ½ tsp (1 g) Freshly ground black pepper; 2 medium (400 g) Yellow onions, thinly sliced (about ¼-inch / 6 mm); 2 tbsp (28 g) Unsalted butter; ½ tsp (2 g) Packed brown sugar; 1 tbsp (15 ml) Balsamic vinegar; ¾ cup (180 ml) BBQ sauce (store-bought or homemade); 8 slice (120 g) Bacon strips, cooked until crispy, roughly chopped; 4 whole Burger buns; 4 slice (100 g) American cheese slices (optional); 4 leaf Lettuce leaves (butter lettuce or leaf lettuce) (optional); 1 medium (150 g) Tomato, sliced (optional)

From the MyKitchenBank Kitchen

Juicy grilled beef burgers topped with deeply caramelized onions, crispy bacon, and a tangy-sweet BBQ glaze. The slow-cooked onions develop rich, complex flavor that elevates these burgers far beyond the everyday. A perfect summer cookout burger with serious depth.

Prep: 15 min
Cook: 35 min
Wait: 40 min
Total: 1 hr 30 min
Makes: 4 burgers

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Steps

Before you start

Oil your grill grates and preheat to medium-high heat (about 400°F / 200°C)
Cook the caramelized onions first—they take 30–40 minutes and can rest while you grill
Have all toppings and buns ready before you start grilling the patties

1
Cook the bacon
- Place bacon strips in a cold 12-inch skillet and set over medium heat.
- Cook for 8–10 minutes, stirring occasionally, until the bacon is golden-brown and crispy.
- Transfer to a paper towel to drain, then roughly chop.
- Set aside.
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Ready when: Bacon is crispy and browned, fat is rendered
Tip: Start bacon in a cold pan so it cooks evenly and renders its fat gradually
2
Start the caramelized onions
- Pour off all but 1 tablespoon of bacon fat from the skillet (save the rest for another use).
- Add the sliced onions and butter.
- Stir to coat, then reduce heat to medium-low.
- Cook for 30–35 minutes, stirring every 5 minutes.
- The onions will release moisture first, then gradually shrink and turn deep golden brown.
- In the last 2 minutes, add the brown sugar and balsamic vinegar, stirring until the sugar dissolves.
- Season with a pinch of salt and pepper to taste.
- Transfer to a small bowl and keep warm.
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Ready when: Onions are deeply golden brown and very soft, shrunken to about one-third their original volume
Tip: Don't rush caramelization—the slow process develops deep sweetness. Stir regularly to prevent burning on the bottom.
3
Form the burger patties
- Divide the cold ground beef into 4 equal portions (about 6 ounces / 170 g each).
- Gently form each into a patty about ¾-inch (2 cm) thick and 3.5 inches (9 cm) wide, being careful not to overwork the meat.
- Make a slight thumbprint depression in the center of each patty with your thumb—this prevents the burger from puffing up during cooking.
- Season the top and bottom of each patty generously with kosher salt and black pepper just before grilling.
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Ready when: Patties are evenly shaped and firm
Tip: Handle the meat as little as possible—overworking it makes tough, dense burgers. Keep beef cold until you're ready to grill.
4
Grill the pattiesOven 400°F / 205°C
- Place the patties on an oiled grill grate over medium-high heat (400°F / 200°C).
- Do not move them for the first 3–4 minutes.
- They should develop a golden-brown crust.
- Flip each patty once and cook for another 3–4 minutes for medium doneness (160°F / 71°C internal temperature).
- If using cheese, add a slice to each patty in the last minute of cooking and cover the grill with the lid so it melts.
- Remove burgers and let rest for 2 minutes on a warm plate.
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Ready when: Meat reaches 160°F (71°C) internal temperature; cheese is melted
Tip: Resist the urge to flip early or press down on the patty—this squeezes out flavorful juices and creates uneven cooking.
5
Toast the buns
- Split the burger buns and place them cut-side down on the grill grates for 1–2 minutes, until lightly toasted and marked with grill lines.
- Watch carefully so they don't burn.
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Ready when: Buns are golden brown with light grill marks
Tip: Toasted buns hold up better to toppings and add a subtle nutty flavor.
6
Assemble the burgers
- Spread a thin layer of BBQ sauce on both sides of each toasted bun.
- Place a hot patty on the bottom bun.
- Top with a generous spoonful (about 3–4 tablespoons / 45–60 g) of warm caramelized onions, then scatter some of the chopped bacon over the onions.
- Add lettuce and tomato slices if desired.
- Finish with the top bun.
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Ready when: Burgers are fully assembled
Tip: Layer toppings in this order: sauce, patty, warm onions, bacon, fresh toppings, sauce, top bun. This prevents the bun from getting soggy.

Good to know

Tips

Start the caramelized onions first—they take 30–40 minutes and can rest while you prep the burgers and grill. This makes timing much easier.
Use an 80/20 ground beef blend for the juiciest burgers. Higher fat content (70/30) keeps the patties moist but can flare up on the grill.
Don't skip the thumbprint indent in the center of each patty. It prevents the burger from doming and cooking unevenly in the middle.
For extra smoky flavor, add a pinch of smoked paprika or a dash of liquid smoke to the BBQ sauce before grilling.

Make ahead

The caramelized onions can be made up to 2 days ahead. Store them in an airtight container in the refrigerator, then gently reheat in a skillet over medium-low heat for 2–3 minutes before serving. Bacon can also be cooked up to 1 day ahead and stored in the fridge; reheat gently in a skillet or oven before serving. Form the burger patties up to 4 hours ahead and refrigerate on parchment, covered.

Storage & reheating

Store leftover caramelized onions in an airtight container in the refrigerator for up to 4 days. Cooked burgers are best eaten fresh but can be refrigerated in an airtight container for up to 2 days; reheat gently in a skillet over medium heat or wrap in foil and warm in a 300°F (150°C) oven for 10 minutes. Do not freeze assembled burgers.

Substitutions

BBQ sauce (store-bought or homemade) → Homemade BBQ sauce (equal parts ketchup, Worcestershire sauce, brown sugar, apple cider vinegar, and mustard). For a tangier sauce, increase the vinegar; for sweeter, add more brown sugar
American cheese slices → Cheddar, Swiss, or pepper jack cheese (1-ounce / 28 g slice each). Any melting cheese works; cheddar adds a sharper tang, Swiss brings nuttiness
Yellow onions → Red onions or a mix of red and yellow. Red onions take slightly longer to caramelize but develop a deeper, sweeter flavor
Balsamic vinegar → Apple cider vinegar or red wine vinegar. Use 2 teaspoons (10 ml) to avoid over-acidifying; apple cider vinegar adds subtle sweetness