Half-Glazed Caramelized Onion and Balsamic Brussels Sprouts

By AislePrompt Test Kitchen · Reviewed by AislePrompt Editorial · ·

Brussels sprouts sautéed with sweet caramelized onions and finished with a tangy balsamic glaze for a vibrant side dish. This american-inspired vegetarian (vegetarian) ready in about 30 minutes pairs Brussels sprouts, halved, medium yellow onion, thinly sliced, olive oil for a weeknight-friendly dinner that comes together with one pan and minimal cleanup. Each serving lands at about 150 calories and feeds 4, so it slots cleanly into a weekly meal plan and pairs well with a quick salad or grain on the side. Tap "Plan a meal with the AI" below to drop this recipe into your week and send the ingredients straight to Instacart. Nutrition values are approximate, calculated from USDA FoodData Central (fdc.nal.usda.gov) — verify against ingredient labels for any health-driven dietary plan.

Prep: 10 min Cook: 20 min Serves 4 American cuisine 150 cal/serving
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Ingredients

Instructions

  1. Step 1: Heat 2 tbsp olive oil in a large skillet over medium heat. Add 1 medium thinly sliced yellow onion and 1 tsp brown sugar, sauté for 10-12 minutes until onions are deeply golden and caramelized, stirring occasionally.
  2. Step 2: Add 3 tbsp olive oil to the skillet along with 1 lb halved Brussels sprouts, 1/2 tsp salt, and 1/4 tsp black pepper. Cook over medium-high heat for 8-10 minutes, stirring frequently until the edges of the sprouts are browned and tender.
  3. Step 3: Pour in 2 tbsp balsamic vinegar and cook for another 2 minutes, stirring until the vinegar reduces to a glossy glaze coating the Brussels sprouts and onions.
  4. Step 4: Remove from heat and serve warm as a flavorful side.

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Frequently asked questions

How long does Half-Glazed Caramelized Onion and Balsamic Brussels Sprouts take to make?

Total time is about 30 minutes (10 min prep + 20 min cook). Most home cooks find this fits comfortably into a weeknight; double the batch on Sunday for two dinners.

How do I store leftover Half-Glazed Caramelized Onion and Balsamic Brussels Sprouts?

Cool to room temperature within 2 hours, then store in an airtight container in the fridge for up to 4 days. Reheat covered in a 350°F oven for 10-12 minutes, or microwave at 70% power in 60-second bursts to keep brussels sprouts, halved from drying out.

Can I substitute ingredients in Half-Glazed Caramelized Onion and Balsamic Brussels Sprouts?

Yes — most ingredients in this recipe have flexible swaps. For oil, use any neutral high-smoke-point oil (avocado, grapeseed, refined coconut). For aromatics, dried herbs at ⅓ the volume of fresh work in a pinch. The full ingredient list is shoppable on Instacart so you can see substitutes in real time.

How do I scale Half-Glazed Caramelized Onion and Balsamic Brussels Sprouts for a different number of people?

The recipe is written for 4 servings. Multiply each ingredient by (your serving target / 4). Cook time stays roughly the same up to 2x; for 3-4x batches, switch from a skillet to a sheet pan or stockpot so the food isn't crowded — overcrowding steams instead of browns.

Is Half-Glazed Caramelized Onion and Balsamic Brussels Sprouts vegetarian?

Yes — this recipe is tagged vegetarian based on its ingredient list. Always cross-check labels for packaged ingredients (sauces, broths, condiments) since formulations vary by brand.