White Gravy Ingredients 2 ½ cups of water ½ cup of cashews 1/8 cup of cornstarch 1 teaspoon of salt 1 teaspoon of onion powder 1 teaspoon of garlic powder Preparation Blend all ingredients until smooth, except 2 cups of the water. Pour into saucepan. Rinse blender with the remaining water. Add to pan. Lightly boil 1-2 minutes, stirring.