Mango Blueberry Muffins With Coconut Streusel

INGREDIENTS

• 1/4 cup all-purpose flour
• 1/4 teaspoon ground cinnamon (optional)
• 1 tablespoon white sugar
• 3 tablespoons sweetened flaked coconut, chopped
• 1 pinch salt
• 2 tablespoons butter
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• 1/2 cup unsalted butter
• 1 1/4 cups white sugar
• 1/2 teaspoon salt
• 2 eggs
• 1 3/4 cups all-purpose flour
• 2 teaspoons baking powder
• 1/2 cup buttermilk
• 1 cup fresh blueberries
• 1 cup mango - peeled, seeded and diced