onion rings on a white plate placed on a wooden table square image

Mustard Baked Onion Rings

  • Author: Whitney Carlson
  • Prep Time: 5 minutes
  • Cook Time: 17 minutes
  • Total Time: 22 minutes


These Mustard Dipped Onion Rings really are delicious! The tangy flavor of the farm-grown, whole mustard seeds drives delicious while the oat flour and spices add the perfect crunch. Best of all, they are baked – not fried.



  • 1 yellow or Vidalia onion, large

  • ½ c French’s 100% Natural Mustard
  • 1 egg
  • 1 TBSP apple cider vinegar

  • 1 c gluten-free oat flour
  • 1 TBSP garlic powder
  • 1 TBSP black pepper
  • 1 TBSP baking powder
  • 1 tsp sea salt


  1. Preheat oven to 350 degrees F. Prepare a baking sheet lined in foil.
  2. Prepare onions by peeling the onion and cutting in a “ring” fashion. Separate onion rings once cut and set to the side.
  3. Combine mustard, egg and apple cider vinegar in a bowl, whisking to combine.
  4. In an additional bowl, combine Gluten-Free Oat Flour, garlic powder, black pepper, baking soda, and sea salt.
  5. Dip your onion into the mustard mixture, being sure to coat the onion entirely.
  6. Dredge the onion into the flour mixture, combining thoroughly.
  7. Repeat steps 5-6 and place on baking sheet.
  8. Bake onions at 350 degrees F for approximately 17-20 minutes until golden brown.

  • Category: Side Dish
  • Method: Baked
  • Cuisine: American