1. Preheat the oven to 200 ° C. Rub the margarine and sugar with the electric mixer until you get a pale, fluffy yellow cream. Add the egg, Nestlé Fitness cereal, orange peel and concentrated milk. Mix well.
2. In a medium bowl, sift flour, baking powder, baking soda and salt. Add enough margarine to soften the ingredients.
3. Put the cranberries inside. Fill the molds, previously greased, with enough dough to cover 2/3 of the forms. Bake in the preheated oven at 200 ° C for 25-30 minutes or until the muffins turn golden.