Prep Time:  15 mins
Cook Time:  45 mins
Total Time:  60 mins
Servings:  4
Close-up of grilled onion blossom

Learn how to make a delicious Blooming Onion on the Weber Q, a great recipe for tailgating! We lightly bread the onion and grill it on a maple plank for some great flavor and beautiful presentation.


  • 1 egg
  • 1 cup milk
  • 1 large sweet onion
  • 1 Tbsp ketchup
  • ½ cup mayonnaise
  • 1 cup breadcrumbs
  • cajun seasoning (to taste)
  • 2 Tbsp cream-style horseradish sauce

Items You'll Need


Instructions for Breading Mixture

  1. Combine milk and egg
  2. Put 3/4 cup breadcrumbs in seperate bowl, leaving the remainder to sprinkle

Instructions for Zesty Dipping Sauce

  1. Combine mayo, ketchup, horseradish
  2. Toss all ingredients and add the cajun seasoning. How much seasoning you add depends on how zesty you want it

    Instructions for Cooking Onion

  1. Pre-heat grill to 350°F
  2. Slice the top of the onion, but not the root
  3. Peel the outer skin of the onion
  4. Place it cut side down, and slice from 1/2 inch of root all the way through
  5. Start with the 4 even sections, and divide them evenly until they're the size you like
  6. When you finish slicing, flip it over and gently separate the petals
  7. Next coat it in the breading mixture
  8. Flip the onion over and set it on top of the breadcrumbs in a bowl, and sprinkle extra breadcrumbs on top. Make sure to get plenty between the petals.
  9. Next put it on a maple plank(soak plank hours before), and bake for 40-45 minutes. Make sure and check it at the 30 minute mark.
  10. Finally remove the onion from the grill and serve it with the Zesty Dipping Sauce and Enjoy!