Best Blueberry Muffins

Ingredients (15)

• For the streusel topping:
• 1/4 cup all-purpose flour
• 1/4 cup packed light brown sugar
• 2 1/2 tablespoons cold unsalted butter
• For the blueberry muffins:
• 2 cups all-purpose flour
• 1/2 cup granulated sugar
• 1 tablespoon baking powder
• 1/2 teaspoon kosher salt
• 1/4 cup packed light brown sugar
• 1/2 cup unsalted butter
• 2 large eggs
• 3/4 cup buttermilk
• 1 1/2 teaspoons pure vanilla extract
• 1 1/4 cups blueberries