Preheat your oven to 300°F (150°C). Line a large, rimmed baking sheet with parchment paper.

Melt 1/2 cup butter in a small saucepan or microwave. Stir in garlic powder, onion powder, parsley flakes, sea salt, black pepper, and optional smoked paprika & cayenne pepper until well combined.

Add the finely grated Parmesan and sharp cheddar cheeses to the seasoned butter mixture; stir well until the cheeses are evenly incorporated.

Pour the seasoned cheesy butter mixture over Ritz Bits in a very large bowl. Gently toss until all crackers are evenly coated.

Spread the coated Ritz Bits in a single layer on the prepared baking sheet. Bake for 15-20 minutes at 300°F (150°C), stirring gently halfway through.

If they are still soft, bake another 3-5 minutes, watching closely to prevent burning.

Remove from oven and let cool completely on the baking sheet. Gently break apart any stuck clusters and transfer to a serving bowl.

Store any leftovers in an airtight container at room temperature for up to 3-5 days. For longer shelf life, consider freezing them.

To regain their crunch, reheat in a warm oven when ready to enjoy.