Stuffed Burger Buns with Melted Cheddar and Caramelized Onions Step-by-step instructions

Before you start

Before starting, set out the butter and eggs to come to room temperature. Warm the milk and water to about 110°F (43°C) — warm to the touch but not hot. Have all the ingredients measured and ready. If using active dry yeast, proof it with the sugar and warm liquid until foamy.

Prepare a clean surface for kneading and a greased bowl for the rise. Line a baking sheet with parchment paper. Caramelizing the onions takes about 20 minutes, so you can do that while the dough rises. Make sure the beef patties are shaped and ready before the dough finishes rising.

Instructions

Dough and Filling

1. 1Make the Dough
   In a large bowl, combine the warm milk, warm water, sugar, and yeast. Let sit for 5 minutes until foamy. Add the egg white, butter, and 2 cups of the flour; stir until smooth. Gradually add the remaining 2 cups flour, stirring until a soft dough forms. Turn out onto a floured surface and knead for 6-8 minutes until smooth and elastic. Place in a greased bowl, cover, and let rise in a warm spot for 1 hour, or until doubled.
   Look for The dough is smooth, elastic, and springs back when poked.
   Tip If the dough is too sticky, add a little more flour, a tablespoon at a time.
2. 2Caramelize the Onions
   While the dough rises, heat the olive oil in a skillet over medium heat. Add the sliced onions and 1 tsp sugar. Cook, stirring occasionally, for 15-20 minutes, until the onions are deeply golden and caramelized. Set aside to cool.
   Look for Onions are soft, golden brown, and smell sweet.
   Tip Don't rush this step; low and slow gives the best flavor.
3. 3Season the Beef
   In a bowl, combine the ground beef, salt, pepper, and molasses. Mix gently with your hands until just combined. Shape into 6 patties, each about 3 inches wide.
   Look for The patties hold together but are not overworked.
   Tip Use a light touch; overmixing makes the beef tough.

After this phase, the dough should have doubled in size and be soft and pillowy. The onions should be deeply caramelized, sticky, and sweet.

The beef patties should be seasoned and shaped, holding together without being tough. The kitchen will smell of yeast and caramelized onions — a promising start.

Assembly and Baking

4. 4Assemble the Buns
   Punch down the risen dough and divide into 6 equal pieces. On a floured surface, flatten each piece into a 5-inch round. Place a beef patty in the center, then top with a spoonful of caramelized onions, a slice of roasted red pepper, and a slice of cheddar. Gather the edges of the dough over the filling and pinch tightly to seal. Place seam-side down on a parchment-lined baking sheet.
   Look for The buns are smooth and sealed with no filling showing.
   Tip Pinch the dough firmly to prevent the filling from leaking during baking.
5. 5Brush and Sprinkle
   Beat the egg yolk with 1 tablespoon of water. Brush the tops of the buns with the egg wash, then sprinkle generously with sesame seeds.
   Look for The buns are glossy and coated with seeds.
   Tip Egg wash gives a shiny, golden crust.
6. 6Bake the Buns
   Preheat the oven to 350°F (180°C). Bake the buns for 22 minutes, until deeply golden brown and the internal temperature of the beef reaches 160°F (71°C). Let rest for 5 minutes before serving.
   Look for The buns are golden brown and sound hollow when tapped.
   Safe temperature 160°F (71°C) internal temperature (ground meat)
   Tip Check the temperature with an instant-read thermometer inserted through the side of a bun.

The buns should be neatly sealed, golden, and glossy from the egg wash. During baking, they will puff up and turn a deep golden brown. The aroma of baking bread and melting cheese fills the kitchen. The buns are ready when they sound hollow when tapped and the beef reaches 160°F (71°C).

Serving

7. 7Slice and Serve
   Let the buns cool for 5 minutes on the baking sheet. Slice one open to reveal the melted cheese and juicy filling. Serve warm.
   Look for The cheese is melted and the bun is soft and steamy.
   Tip Use a serrated knife for a clean cut.

When you slice open a bun, the cheese should be melted and stretchy, the beef juicy, and the onions soft. The brioche should be tender and slightly sweet. Serve warm, with extra napkins — this is a messy, delicious experience.

Common mistakes

Avoid overworking the dough; it should be soft and slightly tacky but not sticky. If the dough tears when wrapping the filling, it's too dry — lightly wet your fingers to seal. Don't overfill the buns; too much filling makes them hard to seal and they may burst.

Make sure the beef patties are not too thick; they need to cook through in the same time as the dough. Avoid opening the oven frequently while baking, as that lowers the temperature. Let the buns cool slightly before slicing to prevent the cheese from oozing out completely.

How to tell it’s done

The buns are done when they are deeply golden brown on top and sound hollow when tapped on the bottom. The internal temperature of the beef should reach 160°F (71°C) on an instant-read thermometer inserted through the side of a bun.

The cheese should be fully melted and the dough cooked through — no raw dough at the center. Let the buns rest for 5 minutes before slicing; this allows the juices to redistribute and prevents the filling from running out. If the tops brown too quickly, loosely tent with foil.

• Ground meat: 160°F (71°C) in the thickest part
• Egg dishes: 160°F (71°C) in the thickest part