Preheat oven to 350 degrees F. Place four 6-oz ovenproof ramekins (or ovenproof dessert cups) in an 8-inch square baking dish with tall sides. Put a kettle of water on to boil for the water bath.

Combine sugar, egg yolks, orange zest, orange juice, and oil in a large bowl; using an electric mixer, blend until light in color and foamy, about 1 minute.

In a small bowl, combine flour and salt.

Add the flour mixture and milk to the egg yolk mixture in 3 additions, alternating the flour mixture with the milk and blending well after each addition.

Beat the egg whites in a medium bowl with an electric mixer on medium-high speed until stiff peaks form. Using a flexible spatula, gently fold the beaten whites into the batter in 3 additions.

Divide cranberries among the ramekins (about 2 tablespoons each). Top with the batter (about 2/3 cup each).

Pour boiling water into the baking dish to reach halfway up the sides of the ramekins. Bake until puffed and are lightly browned, about 30 minutes.

Remove the baking dish from the oven; transfer the ramekins to a wire rack and let cool for 10 minutes. Dust with confectioner’s sugar before serving warm or at room temperature.