Charbonnel et Walker Pink Heart Marc De Champagne Truffles. Luxurious and beautifully packaged, these pink chocolate truffles are handmade with a milk chocolate Marc de Champagne ganache centre and finished with a light dusting of icing sugar. Founded in 1875, Charbonnel et Walker is one of Britain's earliest chocolatiers. All their chocolates are handmade from traditional recipes.