This stuff is so addictive! 1 (1 oz) package ranch dressing mix 1/4 cup canola or vegetable oil 1/2 t garlic powder (or to your taste) salt to taste 1 box or bag oyster crackers Preheat oven to 250. In a large mixing bowl, combine first 5 ingredients and mix well. Stir in oyster crackers mix to coat. Pour crackers onto a large cookie sheet. Bake 15 minutes, stirring every 5 minutes or so.