Ingredients Used In a McDonald's Hamburger What’s in a McDonald's Hamburger? 100% Beef Patty, Regular Bun, Ketchup, Mustard, Pickle Slices, Onions 100% Beef Patty [The 14 year-old one may have had Pink-Slime in 1999] McDonald's makes no claim its beef is free of hormones or antibiotics Regular Bun . Normally made of flour, salt, water, and yeast Enriched flour (bleached wheat flour, malted barley flour, niacin, reduced iron, thiamin mononitrate, riboflavin, folic acid, enzymes), water, high fructose corn syrup, sugar, yeast soybean oil and/or partially hydrogenated soybean oil, contains 2% or less of the following: salt, calcium sulfate, calcium carbonate, wheat gluten, ammonium sulfate, ammonium chloride, dough conditioners (sodium stearoyl lactylate, datem, ascorbic acid, azodicarbonamide, mono and diglycerides, ethoxylated monoglycerides, monocalcium phosphate, enzymes, guar gum, calcium peroxide,...
