Perfect blueberry muffins recipe

3 cups blueberries
1 1/4 cups granulated sugar
1 1/4 cups light brown sugar
4 large eggs
1 cup vegetable oil
1 teaspoon pure vanilla extract
2 cups sour cream
4 cups all purpose flour
1 teaspoon baking soda
1 teaspoon salt
Demerara sugar to sprinkle on top (optional)

Directions

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