Instructions

  1. Preheat oven to 375 degrees.
  2. Combine flour, sugars, baking powder and salt in a large bowl.
  3. Stir in milk, egg, butter and lemon zest.
  4. Stir in chips and blueberries.
  5. Spoon into lined muffin pans, filling 3/4 full. Sprinkle with streusel topping.
  6. Bake for 22 to 25 minutes or until wooden pick inserted in center comes out clean.
  7. For Streusel combine: 1/3 cup granulated sugar, 1/4 cup all-purpose flour and 1/4 teaspoon cinnamon in a small bowl. Cut in 3 tablespoons butter with pastry blender or knife until mixture resembles coarse crumbs.