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Grilled Onion Blossoms

Grilled onion blossoms are a BBQ appetizer where a whole sweet onion is cut into a blossom shape, grilled until tender, then opened up so the seasoning shows between charred layers. This method uses foil grilling for caramelized edges and a soft, pull-apart center.
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Prep Time 15 minutes
Cook Time 30 minutes
Total Time 45 minutes
Servings: 4 servings
Course: Appetizer
Cuisine: American
Calories: 420
Ingredients Equipment Method Notes

Ingredients
  

Onion and seasoning
  • 4 large sweet onions Leave the root intact so the wedges stay attached.
  • 0.25 cup olive oil
  • 2 tsp paprika
  • 1 tsp garlic powder
  • 1 tsp onion powder
  • 0.5 tsp cayenne pepper
  • salt and pepper to taste Season to taste at the oil-and-spice stage.
Serving
  • 1 ranch or comeback sauce for dipping
  • fresh parsley for garnish Use chopped or torn parsley for a bright finish.

Equipment

  • 1 sheet pan

Method
 

Prep the onion blossoms
  1. Cut off the top of each onion and peel away the papery skin, leaving the root intact.
  2. Make vertical cuts from the top down, stopping before the root, creating 8-12 wedges that remain attached.
  3. Gently separate the wedges to create a blossom shape.
Season and grill
  1. Brush the onions with olive oil and sprinkle with paprika, garlic powder, onion powder, cayenne pepper, salt, and pepper.
  2. Wrap each onion in foil and grill over medium heat for 25-30 minutes until tender and caramelized.
Finish and serve
  1. Unwrap the onions, garnish with fresh parsley, and serve with ranch or comeback sauce for dipping.

Notes

Pro tip: keep cuts shallow enough that the root stays intact—this is what holds the blossom open on the grill. Store leftovers covered in the fridge for up to 3 days; reheat on a grill or in a 350°F oven until warmed through (the texture softens). Freezing isn’t recommended because the onion structure can get watery after thawing. For a dairy-free option, choose a dairy-free ranch-style dip for dipping.