In a large bowl, combine ground chicken, egg, plain breadcrumbs, ranch seasoning mix, minced garlic, and diced onion. Mix gently until just combined.

Divide the mixture into 6-8 equal portions and shape into patties about ½ inch thick.

In a skillet, heat enough oil to generously coat the bottom over medium heat for about 2-3 minutes.

Carefully place the patties into the hot oil and cook for approximately 4-5 minutes per side until golden brown.

Remove the cooked patties and let them drain on a paper towel-lined plate.