The ultimate beef burger

MAKES 4 PREP AND COOK TIME 30 MINUTES

30g butter 2 (300g) brown onions, chopped finely 500g beef chuck, chopped coarsely (see Test Kitchen tips) 1 egg ⅔ cup (50g) fresh breadcrumbs 1 tablespoon Worcestershire sauce

1 Heat the butter in a large frying pan over medium heat. Add onions; cook, stirring, until golden and caramelised. Cool. 2 Meanwhile, pulse the beef in a food processor, in two batches, until coarsely minced (or use coarse plate of a mincer). 3 Combine beef, caramelised onion, egg, breadcrumbs and Worcestershire sauce in a large bowl. Season well with salt and freshly ground black pepper, and mix well. Form mixture into four patties. 4. Place patties on a plate and cover with plastic wrap. Refrigerate until needed. Suitable to freeze. Not suitable to microwave.