Why Caramelized Onions Work on Smash Burgers
Caramelized onions add sweetness, depth, and moisture to smash burgers. Slow cooking breaks down sugars and softens the onions, creating a jammy layer that complements the crispy, beefy patty.
How to Make Caramelized Onions for Smash Burgers
Slice yellow onions thinly and cook them low and slow in butter or oil with a pinch of salt. Stir occasionally and cook for 30 to 45 minutes until deep golden brown. For a faster method, use a pinch of sugar to speed up browning, but avoid burning.
Best Practices and Serving Tips
Use about 1/4 to 1/3 cup of caramelized onions per smash burger. Add them just before serving so the bun stays crisp. Pair with American cheese, pickles, and a simple sauce for a balanced smash burger.
