Preheat oven to 400 degrees F., and grease muffin tins or line with papers. Cool in the tin for 5 minutes, then transfer to a wire rack to cool completely. Bake in the preheated oven until tops spring back when lightly pressed and muffins are light golden brown, 15 to 25 minutes. They’re gluten free, vegan, sugar free, wholesome and wonderfully satisfying! DIRECTIONS. These Oatmeal Cranberry Muffins cover all the bases. These Healthy Cranberry Oatmeal Muffins are bursting with tangy cranberry flavour and pack a nutritional punch My mom has always made the most uh-maaaazing cranberry bread. Mix all dry ingredients in a large bowl, then stir in cranberries to coat with flour. At this time of year (December), we love cooking with cranberries because fresh cranberries are easy to find in the grocery store. It was (and still is) tangy, tasty and oh-so delicious.