Caramelized Onion and Pecan Brussels Sprouts

This elegant side dish transforms humble Brussels sprouts into something special with sweet caramelized onions and toasted pecans. The sprouts are thinly sliced for quick cooking and better flavor absorption, while the onions develop deep caramel notes from slow cooking. The toasted pecans add richness and crunch that complements the tender vegetables perfectly. Make-ahead prep makes this ideal for holiday meals or dinner parties when you want impressive results with minimal last-minute effort.
Ingredients
Instructions
- 1
Cut Brussels sprouts in half, then slice each half crosswise into thin slices
- 2
Place sprouts and sliced onion in separate resealable bags and refrigerate for 8 hours
- 3
Melt butter in large heavy skillet over medium-high heat
- 4
Cook pecans in butter for 5 minutes, stirring frequently, until toasted, then remove from skillet
- 5
Add onion to skillet and cook for 15 minutes, stirring occasionally, until caramel colored
- 6
Add Brussels sprouts and toasted pecans to skillet
- 7
Cook about 3 minutes, stirring frequently, until sprouts are tender
- 8
Sprinkle with salt and pepper
Tips
Refrigerate the prepped vegetables overnight to save time and make flavors more concentrated.
Don't rush the onion caramelization - low and slow cooking develops the best flavor.
Toast pecans until fragrant but watch carefully to prevent burning.
Good to Know
Refrigerate leftovers up to 3 days. Reheat gently in skillet.
Brussels sprouts and onions can be prepped and bagged up to 2 days ahead.
Serve warm as a side dish with roasted meats or holiday meals.
Common Mistakes
Don't skip the overnight refrigeration step - it helps concentrate flavors.
Cook onions on medium-high heat to avoid burning while caramelizing.
Substitutions
Dairy-Free Swaps
General Alternatives
FAQ
Can I make this without the overnight prep?
Yes, but the vegetables will have less concentrated flavor. You can use them immediately after slicing.
What if my onions aren't caramelizing?
Lower the heat slightly and be patient. True caramelization takes time and shouldn't be rushed.
How long will leftovers keep?
Store in refrigerator up to 3 days. Reheat gently in a skillet over medium heat.