White Cheddar Pierogies

Bleached Enriched Flour (_Wheat_ Flour, Benzoyl Peroxide, Niacin, Iron, Thiamin Mononitrate [Vitamin B1], Riboflavin [Vitamin B2], Enzyme, Folic Acid), Fresh Potato, Water, Margarine (Canola Oil, Water, Modified Palm and Palm Kernel Oil, Salt, _Whey_ Powder, Vegetable Mono and Diglycerides, _Soya_ Lecithin, Sodium Benzoate, [Preservative], Citric Acid, Artificial Flavor, Vitamin A Palmitate, Vitamin D3), White Cheddar _Cheese_ (_Milk_, Bacterial Culture, Salt, Enzyme, Calcium Chloride), Onion, Seasoning (Salt, Sugar, Dehydrated Onion, Hydrolyzed _Soy_ and Corn Protein, Cornstarch, Spice, Disodium Inosinate, Disodium Guanylate), Canola Oil, _Egg_ White, Salt, Cheddar Paste (_Cheese_, Modified _Milk_ Ingredients, Water, Sodium Citrate, Sodium Phosphate, Sorbic Acid, Salt, Enzyme), Horseradish Powder