Step 1

Preheat oven to 350º. Lightly grease a muffin tin with cooking spray or vegetable oil, or line with paper muffin liners.

Step 2

Prepare streusel topping and set aside.

Step 3

In a small bowl, whisk together flour, baking powder and salt and set aside.

Step 4

In a large bowl, beat butter and sugar until light and fluffy. Add eggs, vanilla and milk. Add flour mixture and stir until just combined. Stir in blueberries.

Step 5

Divide batter evenly into 12 muffin cups. Sprinkle muffins with streusel topping.

Step 6

Bake at 350º for 20 to 25 min, until a tester inserted into the center comes out clean. When muffins are done, cool for a few minutes in the muffin pan before removing to cool on a wire rack.

Step 7

Streusel ToppingIn a small bowl, whisk together sugar and flour. Add oil and mix until mixture has a sandy texture.