Mamma Mia: Double Ingredients is a promotional expansion for Mamma Mia consisting of 10 double ingredient cards, two in each of the five ingredients. During game set-up, the double ingredient cards are substituted into the deck in place of two ingredients of each type. For game play, a double ingredient is handled exactly the same as the single ingredients, but of course count as two ingredients of that kind. If an ingredient is needed to complete an order, double ingredients on display must be used first. If necessary, a player must overpay, which also applies to double ingredients played from the hand to complete an order. Also included with Spielbox Magazine #2/2015.