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Cheesy Mozzarella Onion Rings Recipe

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4.7 from 138 reviews

Mozzarella Stick Onion Rings combine the crispy, golden goodness of classic onion rings with a gooey mozzarella cheese center for a delightful appetizer or snack. These rings are stuffed with mozzarella, coated in a triple-layer breading, and deep-fried to perfection, then served with marinara sauce for a deliciously indulgent treat.

Ingredients

Main Ingredients

  • 2 large white onions
  • 3 slices mozzarella cheese

Dredging and Coating

  • 2 cups all-purpose flour
  • 5 large eggs
  • 2 1/2 cups plain breadcrumbs

For Frying and Serving

  • Vegetable oil, for deep frying
  • Marinara sauce, for dipping

Instructions

  1. Prepare Onion Rings: Peel the onions and slice into 1/2-inch thick rings, carefully separating them to maintain whole rings.
  2. Stuff with Mozzarella: Slice mozzarella cheese into 4 even strips. Nest a smaller onion ring inside a larger ring and place mozzarella strips in the space between them. Repeat with all onion rings.
  3. Freeze Rings: Arrange the stuffed onion rings in a single layer on a tray and freeze for 1 hour until firm to ensure the cheese stays inside during frying.
  4. Set Up Breading Stations: Prepare three bowls: one with flour, one with beaten eggs, and one with breadcrumbs. Remove frozen onion rings from the freezer.
  5. Bread the Rings: Dredge each stuffed onion ring in flour, dip into egg, then coat thoroughly with breadcrumbs. For an extra crispy crust, repeat the egg and breadcrumb dip. Place coated rings on a tray and freeze until ready to fry.
  6. Heat Oil: Pour vegetable oil into a deep pot and heat to 350°F (175°C), ensuring enough oil for deep frying.
  7. Fry Onion Rings: Fry the rings in batches, turning occasionally, until golden brown and crisp, about 2–3 minutes. Be careful not to over-fry to prevent cheese leakage.
  8. Drain and Serve: Remove fried rings with a slotted spoon and drain on paper towels. Serve hot with marinara sauce for dipping.

Notes

  • Freezing the stuffed onion rings before frying is essential to keep the cheese from melting too quickly and oozing out.
  • For extra crispiness, double coat the onion rings with egg and breadcrumbs.
  • Use plain breadcrumbs for a neutral crust or seasoned breadcrumbs for extra flavor.
  • Maintain oil temperature around 350°F for perfect frying—too hot will burn the coating, too cool will make them greasy.
  • Serve immediately for best taste and texture.