Preheat the oven to 250°F. Add the butter to a small bowl and melt in the microwave. Once the butter is melted add the ranch seasoning packet (or 3 Tbsp of homemade ranch seasoning), the garlic powder, and the red pepper flakes to the bowl. Whisk the ingredients together until they are well combined.
In a separate large bowl add the oyster crackers, then pour the butter mixture over the oyster crackers. Mix carefully with a rubber spatula until all the oyster crackers are well coated in the butter and seasoning.
Spread the seasoned crackers on a parchment lined baking sheet. Bake in the preheated oven for 10 minutes. After 10 minutes, remove the baking sheet from the oven and give the crackers a quick stir. Place the baking sheet back in the oven and bake for another 10 minutes.
After the oyster crackers have finished baking, remove them from the oven and allow them to cool slightly before transferring them to a serving bowl. Enjoy!