Set aside when softened. Measure into a large mixing bowl the flour sugar baking powder and walnuts.
Fold in the cooked blueberries.
Take care not to overmix.
Divide the mixture between 9 deep lined muffin tins or 12 lined bun tins.
Muffins are quick and easy to make but they must be eaten when freshly made. Serve with butter for breakfast.
Makes 9 large or 12 small muffins