Blueberry Streusel Muffins

Preheat oven to 375ºF. Grease muffin tin or line with muffin liners.

To prepare the topping, combine all the streusel ingredients until crumbly. Set aside.

In a large bowl, stir together flour, baking powder and salt. In another bowl, whisk together eggs and sugar until combined. Whisk in sour cream, oil and vanilla. Pour the wet mixture into the flour mixture. Mix with a spatula until moistened. Gently fold in 1 1/2 cups blueberries.

Fill each muffin cup 2/3 full with the batter. Cover the batter with the remaining blueberries. Sprinkle around 1 tablespoon of the streusel on top of each muffin. Bake until risen and browned, about 20 minutes. Let cool for 10 minutes in the pan.