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

Melt unsalted butter in a small saucepan over low heat. Stir in garlic powder, onion powder, dried parsley flakes, sea salt, and black pepper.

In a mixing bowl, combine Parmesan cheese and sharp cheddar cheese. Pour the melted garlic butter mixture over the cheeses and mix well.

In a large bowl, toss Ritz crackers with the cheesy mixture until evenly coated.

Spread the coated crackers in a single layer on the prepared baking sheet.

Bake for 15-20 minutes, stirring halfway through, until golden brown.

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