Prepare a pot over light heat. Warm a cup of frozen blueberries to give our dessert a rich, nice color. Remember not to cook them or else, the color will not be that vibrant. Use the same process for fresh berries as well. Let the berries cool before stirring them. Blending pure fresh berries would result to a grayish color. Blend the berries thoroughly to make the mixture about 50% smooth pure and 50% chunks. Set the blended berries aside.