Blender Cranberry Orange Muffins

Into mixing bowl Sift 2 cups of flour and 3 teaspoons baking power.

Into blender put:
1 cup fresh or defrosted cranberries
1 cup milk
Thin yellow rind of one orange
1 egg
3 tablespoons of soft butter or margarine
2/3 cup sugar
1/2 teaspoon salt

Cover and blend on High until cranberries are finely chopped. Pour over dry ingredients and stir just to moisten flour. Turn into greased muffin cups and bake at 400 for 25 minutes. (20 minutes for mini muffins)

Recipe from 1961 cookbook ( I found it online but now i can't find it to give that site credit)