Preheat oven to 350 °F. (180 C)
Chop the cranberries and toss them with 1/3 cup of the sweetener and set aside.
In a mixing bowl, combine sifted flour, baking powder and salt.
In a large mixing bowl beat the eggs lightly.
Add the oil, remaining sweetener and milk and mix well.
Slowly add the dry mixture, mixing in between scoops.
Fold in the cranberries and sweetener.
Fill lined muffin tins about 2/3 full.
Bake for about 18-20 minutes, or until a toothpick inserted into the middle comes out clean.