Preheat your deep fryer or a heavy pot filled with vegetable oil to 350°F (175°C). Prepare a plate lined with paper towels to drain the fried onion balls once cooked.

Finely chop the onions and pat them dry with paper towels to remove excess moisture.

In a mixing bowl, combine the chopped onions with flour, baking powder, salt, black pepper, garlic powder, and paprika. Gradually stir in milk until a thick batter forms. Let the mixture rest for 2-3 minutes.

Carefully drop spoonfuls of the batter into the hot oil and fry in small batches for 3-4 minutes until golden brown.

In a bowl, mix ranch dressing with Cajun seasoning, adjusting spice level as desired until smooth and creamy.