Grease a 12-cup muffin pan and a 6-cup muffin pan (1/3 cup or 80 mls capacity). Reserve ¼ cup berries.

Combine the rest of the berries with the remaining ingredients in a large bowl, stir with a large metal spoon until just combined. Spoon the mixture into prepared pans, and press the reserved berries onto the top of the muffin mixture. Bake in moderately hot oven (375°F) for 18 to 20 minutes. Turn onto a wire rack to cool or serve warm.