Keep them at room temperature until they are ripe. Most stone fruits just get mushy and mealy if you try to ripen them in the refrigerator. However, once they are completely ripe, you can keep them in the fridge a few days. After peaches are cut, they go brown easily. To prevent that, squeeze some lemon juice over them.
White peaches ripen more quickly than other varieties.
We hope that helps. In a medium saucepan, heat the milk until bubbles form around the edge of the pan. Set aside and cover to keep hot. In a blender or food processor, beat the remaining sugar and egg yolks until very thick. With the machine running, gradually add the hot milk.