Chocolate fudge cupcake

Brown sugar, powdered sugar (sugar, cornstarch), unbleached flour (wheat flour, malted barley flour, niacin, iron, thiamin mononitrate, riboflavin, folic acid), water, sour cream (cultured pasteurized cream, milk, nonfat milk, enzyme), unsweetened chocolate, whole eggs, unsalted butter, canola oil, milk, dark chocolate decoration (cocoa mass, sugar, cocoa butter, milkfat, soy lecithin, vanilla), sugar, vanilla, baking soda, salt, soy lecithin (emulsifier), guar gum, xanthan gum