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BBQ Bratwurst with Grilled Onions

BBQ bratwurst with grilled onions: smoky, blistered casings and charred grill marks paired with golden jammy caramelized onions. Finished with a glossy BBQ-honey Dijon glaze for sticky-sweet flavor in every bite.
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Prep Time 15 minutes
Cook Time 45 minutes
Total Time 1 hour
Servings: 6 servings
Course: Dinner
Cuisine: American
Calories: 920
Ingredients Equipment Method Notes

Ingredients
  

Bratwurst & Grill
  • 6 bratwurst sausages
  • 2 tbsp vegetable oil
  • 1 tsp smoked paprika
  • 0.5 tsp garlic powder
  • 0.5 tsp black pepper
Grilled Onions
  • 3 yellow onions thinly sliced
  • 2 tbsp unsalted butter
  • 1 tbsp olive oil
  • 1 tsp brown sugar
  • 0.5 tsp salt
  • 0.25 tsp black pepper
BBQ Glaze
  • 0.5 cup BBQ sauce smoky or original
  • 1 tbsp honey
  • 1 tsp Dijon mustard
  • 1 tsp Worcestershire sauce
To Serve
  • 6 hoagie or bratwurst buns toasted
  • 1 yellow mustard optional
  • 1 pickled jalapeños optional

Equipment

  • 1 sheet pan
  • 1 cast iron skillet

Method
 

Preheat and prep the brats
  1. Preheat your grill or grill pan to medium-high heat (about 400°F) and brush the grates with vegetable oil as a nonstick barrier.
  2. In a small bowl, mix smoked paprika, garlic powder, and black pepper; pat bratwurst sausages dry, then lightly rub with oil and the spice blend.
Grill bratwursts
  1. Place bratwurst sausages on the grill and cook for 12–15 minutes, turning every 3–4 minutes, until deeply charred with visible grill marks.
  2. Check for doneness by cooking until the internal temperature reaches 160°F, then remove from the grill.
  3. During the last 2 minutes of grilling, brush brats generously with BBQ sauce glaze and let it caramelize directly on the grill while staying on the grates at about 400°F.
Caramelize the grilled onions
  1. Heat unsalted butter and olive oil in a wide skillet over medium heat, then add sliced yellow onions, brown sugar, salt, and black pepper.
  2. Cook for 20–25 minutes, stirring occasionally, until the onions are golden, jammy, and caramelized.
Make the BBQ glaze
  1. In a small saucepan, combine BBQ sauce, honey, Dijon mustard, and Worcestershire sauce.
  2. Heat over low for 3–4 minutes, stirring until glossy and slightly thickened.
Toast and assemble sandwiches
  1. Toast hoagie or bratwurst buns on the grill for 1–2 minutes until lightly golden.
  2. Nestle one glazed bratwurst into each bun, top with a generous heap of caramelized grilled onions, and drizzle with extra BBQ glaze.
  3. Serve immediately with yellow mustard and pickled jalapeños if desired.

Notes

Pro tip: pat the bratwurst sausages dry before seasoning so the casings blister and snap when grilled. Refrigerate leftovers in an airtight container up to 3 days; rewarm brats gently and reheat onions in a skillet. Freezing is okay for the brats (up to 2 months) but onions are best fresh. For a lower-sodium swap, use reduced-sodium BBQ sauce and salt for the onions while keeping the cooking times the same.