Balsamic Portobello Burgers with Caramelized Onions & Garlic Aioli

Name: Balsamic Portobello Burgers with Caramelized Onions & Garlic Aioli
Prep time: 1 h 15 min
Cook time: 10 min
Total time: 1 h 25 min
Cuisine: American
Ingredients: 1 head garlic ((to roast)); 3/4 cup raw cashews; 2 cloves garlic, minced ((omit for less intense garlic flavor)); 1 Tbsp avocado or olive oil; 1/3 cup water ((or sub unsweetened almond milk for creamier consistency)); Salt + pepper ((to taste)); 4 medium-large portobello mushrooms ((organic when possible)); 3 Tbsp avocado or olive oil; 1/4 cup balsamic vinegar; 1 Tbsp Italian seasoning ((dried basil + oregano)); 2 cloves garlic, minced ((2 cloves yield ~1 Tbsp or 6 g)); 1 healthy pinch each salt and black pepper; 1 medium white or yellow onion, peeled + sliced into 1/4-inch rings; 4 whole wheat hamburger buns ((ensure vegan-friendly as needed // sub lettuce wraps or GF buns for gluten-free)); 2 ripe tomatoes, sliced ((optional // organic when possible)); Lettuce or greens of choice ((optional))

Instructions

Prep:1h 15minCook:10min

These 10-ingredient portobello burgers are the best mushroom burgers we've ever had! It’s the balsamic-herb marinade and homemade garlic aioli that sets them apart. Sure to please plant-based and meat eaters alike!

Updated at: Fri, 21 Aug 2026 08:28:01 GMT