Costamilk – Chilean Milk Chocolate Bar Costamilk is Costa's milk chocolate bar, sold in Chile under the Excellence line and labeled fino chocolate de leche. It is straightforward, sweet milk chocolate in a full-size 5.11 oz (145 g) bar. If you grew up on Chilean chocolate, this is the blue Costa bar from the supermarket aisle. Why You'll Love It Costa's classic Chilean milk chocolate Sweet and creamy, no filling or add-ins Full-size 5.11 oz (145 g) bar Easy to share or save for later Pairs well with coffee or tea Browse the rest of the Costa collection, compare it with Chocolate Trencito, or see every option in Chocolate Bars. About Costa Costa is one of Chile's best known chocolate and cookie brands, behind everyday favorites like Rama, Chocman and Doblón. Costamilk is its plain milk chocolate bar, the one people reach for when they want chocolate and nothing else.