Preheat the oven to 300°F (150°C) and line a baking sheet with parchment paper.

Melt the unsalted butter in a small saucepan over low heat, then mix in garlic powder, onion powder, dried parsley flakes, sea salt, and freshly ground black pepper.

In a mixing bowl, combine Parmesan and sharp cheddar cheese, then stir in the melted butter mixture until fully coated.

Transfer Ritz Bits to a large bowl, pour the cheesy mixture over, and gently toss until evenly coated.

Spread coated Ritz Bits on the prepared baking sheet and bake for 15-20 minutes, stirring halfway through.

Allow to cool on the baking sheet for a few minutes before transferring to a serving dish.