Ingredients
Method
To make the streusel crumble:
- In a medium bowl, stir together the sugar and flour. Use a pastry blender (or your fingers) to cut in the butter, mixing it thoroughly until it resembles coarse crumbs. Refrigerate until ready to use.
To make the muffins:
- Preheat your oven to 350°F. Spray a 12-cup muffin pan with cooking spray.
- In a medium bowl, stir together the flour, baking powder, and salt.
- In a stand mixer with the paddle attachment, cream the butter and the sugar on medium speed until light and fluffy, about two minutes.
- Reduce the speed to low, then slowly add in the eggs and vanilla. Increase the mixer speed to medium-high, and mix until well incorporated.
- Return the mixer back to a low speed, and add in the flour mixture and sour cream. Mix until well incorporated. Fold in the blueberries.
- Fill your muffin cups about three-quarters full, then sprinkle the streusel crumble on top of each muffin.
- Bake about 24 - 28 minutes. If using a toothpick to test doneness, the toothpick should come out of the center of the muffin clean.
- Store in an airtight container at room temperature.