Blueberry Muffin Tops Recipe

Directions:

1. Special equipment: 2 muffin-top pans, each with 6 (4- by 1/2-inch) muffin-top cups (1/2-cup capacity)*; or regular muffin pans Preheat oven to 375 degrees.
2. Place rack in top third of oven.
3. Generously butter muffin pans.
4. Melt butter in a small saucepan over moderately low heat, then remove from heat.
5. Whisk in milk, then whisk in whole egg, yolk, and vanilla until combined well.
6. Whisk together flour, sugar, baking powder, and salt in a bowl, then add milk mixture and stir until just combined.
7. Fold in blueberries.
8. Divide batter among 12 muffin cups, spreading evenly.
9. Make topping and bake muffins: Use fingertips to combine topping ingredients until crumbly.
10. Sprinkle evenly over batter in cups.
11. Bake until golden, about 18 to 20 minutes, or until a toothpick inserted in the center of a muffin comes out clean.
12. Cool in pans on a rack 15 minutes, then run a knife around edge of each muffin top and carefully remove from cups.
13. Serve warm or at room temperature.