Grilled Beer-Braised Bratwurst with Caramelized Onions

How to Make Grilled Beer-Braised Bratwurst with Caramelized Onions

1. 1

   Step 1: Beer-braise the brats

   Place brats in a wide saucepan or skillet that has a lid and pour in the beer with 1 tsp kosher salt so the liquid comes about halfway up the sausages. Bring to a gentle simmer over medium heat, cover, and let simmer 10–12 minutes until the internal temperature reads about 150°F (66°C). Do not boil—keep the surface calm to avoid splitting the skins. Remove brats to a plate and reserve the braising liquid for optional glazing or deglazing.

   For this step

   • 4 linksBratwurst (fresh, uncooked)
   • 12 fl ozLager or pale ale beer
   • 1 tspKosher salt
   
2. 2

   Step 2: Caramelize the onions

   While the brats simmer, melt the butter in a large skillet over medium-low heat and add the thinly sliced onions with a pinch of salt. Cook slowly, stirring every few minutes, then stir in the brown sugar after 8–10 minutes to encourage deep color; continue cooking 12–18 more minutes until the onions are jammy and golden-brown. If the pan gets too dry or sticks, splash in 2–3 tablespoons of the reserved braising liquid and scrape up any browned bits.

   For this step

   • 2 largeYellow onion, thinly sliced
   • 2 tbspUnsalted butter
   • 1 tbspLight brown sugar
   
3. 3

   Step 3: Preheat grill and prepare brats

   Heat a gas or charcoal grill to medium-high (about 400°F / 200°C) and oil the grates lightly with olive oil on a folded paper towel. Brush the brats lightly with oil and place them over direct heat, turning every 1–2 minutes to build even char and reach a final internal temperature of 160–165°F (71–74°C), about 5–8 minutes. For extra flavor, brush reduced braising liquid on the brats during the last couple minutes of grilling to create a glossy glaze.

   For this step

   • 1 tbspOlive oil (for grill and brushing)
4. 4

   Step 4: Toast buns and assemble

   Split and toast buns cut-side down on the grill for 30–60 seconds until golden and slightly crisp. Nestle each grilled brat in a toasted bun, spoon generous caramelized onions over the top, and finish with a smear of coarse-grain mustard. Let brats rest 2–3 minutes after grilling if you like a juicier bite, then serve immediately.

   For this step

   • 2 tbspCoarse-grain mustard (or Dijon)
   • 4 bunsBuns (kaiser or brat-style)
   
5. 5

   Step 5: Serve and optional tips

   Serve with classic sides like potato salad, beer mustard, or pickles. Leftover braising liquid can be reduced on the stove into a pan sauce or used to braise more sausages; store brats and onions separately in the fridge for up to 3 days.
   

1. Place brats in a wide saucepan or skillet that has a lid and pour in the beer with 1 tsp kosher salt so the liquid comes about halfway up the sausages. Bring to a gentle simmer over medium heat, cover, and let simmer 10–12 minutes until the internal temperature reads about 150°F (66°C). Do not boil—keep the surface calm to avoid splitting the skins. Remove brats to a plate and reserve the braising liquid for optional glazing or deglazing.
2. While the brats simmer, melt the butter in a large skillet over medium-low heat and add the thinly sliced onions with a pinch of salt. Cook slowly, stirring every few minutes, then stir in the brown sugar after 8–10 minutes to encourage deep color; continue cooking 12–18 more minutes until the onions are jammy and golden-brown. If the pan gets too dry or sticks, splash in 2–3 tablespoons of the reserved braising liquid and scrape up any browned bits.
3. Heat a gas or charcoal grill to medium-high (about 400°F / 200°C) and oil the grates lightly with olive oil on a folded paper towel. Brush the brats lightly with oil and place them over direct heat, turning every 1–2 minutes to build even char and reach a final internal temperature of 160–165°F (71–74°C), about 5–8 minutes. For extra flavor, brush reduced braising liquid on the brats during the last couple minutes of grilling to create a glossy glaze.
4. Split and toast buns cut-side down on the grill for 30–60 seconds until golden and slightly crisp. Nestle each grilled brat in a toasted bun, spoon generous caramelized onions over the top, and finish with a smear of coarse-grain mustard. Let brats rest 2–3 minutes after grilling if you like a juicier bite, then serve immediately.
5. Serve with classic sides like potato salad, beer mustard, or pickles. Leftover braising liquid can be reduced on the stove into a pan sauce or used to braise more sausages; store brats and onions separately in the fridge for up to 3 days.