Drizzle melted butter over oyster crackers then sprinkle the ranch dip mix and crushed red pepper flakes over the crackers and stir until all the crackers are coated. Spread on a cookie sheet lined with parchment paper in a single layer. Heat the oven to 350 degrees then place the cookie sheet in the oven turn the oven off once crackers are in the oven. Leave in oven for 15 minuets. remove from oven and let cool. Store in airtight container of zip lock bag.