Double chocolate brownie - Build a Box!

Ingredients: Egg, Sugar, Butter [Milk] (Butter, Salt), Milk Chocolate [15%] (Sugar, Cocoa Butter, Whole Milk Powder, Cocoa Mass, Dextrose, Butter [Milk], Emulsifier [Sunflower Lecithin], Natural Vanilla Flavour), Dark Chocolate [12%] (Cocoa Mass, Sugar, Lactose [Milk], Emulsifier [Soya Lecithin], Vanilla Extract), Wheat Flour (contains Calcium, Iron, Niacin, Thiamin), Cocoa Powder.