A Source of Vitamins and Minerals. Ice cream is also a dietary source of several important minerals. It is particularly rich in calcium and phosphorus, with about 10 percent of the adult recommended dietary allowance, or RDA, of these minerals in a single, one-half-cup serving. Source of Vitamins and Minerals. Ice cream is also a dietary source of several important minerals. It is particularly rich in calcium and phosphorus, with about 10 percent of the adult recommended dietary allowance, or RDA, of these minerals in a single, one-half-cup serving.