Ingredients:
• ½ cup (113 g) unsalted butter, melted and cooled
• 2 large eggs
• ⅔ cup (180 ml) milk (whole or reduced fat)
• 1½ teaspoons pure vanilla extract
• 2 cups (260 g) all-purpose flour
• ⅔ cups (135 g) granulated white sugar
• 2½ teaspoons baking powder
• ¼ teaspoon salt
• 1 cup (240 ml) chocolate chips (semi sweet, bittersweet, milk, or white chocolate chips)
Cinnamon Sugar Topping:
• 1 tablespoon granulated white sugar
• ½ teaspoon ground cinnamon
Method:
- Preheat oven to 375°F (190°C), and place oven rack in the center of the oven. Butter, or line with paper liners, 12 muffin cups.
- In a bowl whisk together the eggs, milk, and vanilla extract.
- In another large bowl whisk together the flour, sugar, baking powder, and salt. Stir in the chocolate chips. With a rubber spatula or wooden spoon fold the wet ingredients, along with the melted butter, into the dry ingredients and stir only until the ingredients are moistened and combined. (Do not over mix or you will have tough muffins.)
- Evenly fill the muffin cups with the batter, using two spoons or an ice cream scoop. In a small bowl combine the topping ingredients and then sprinkle a little topping on each muffin. Place in the oven and bake for about 18 – 20 minutes, or until a toothpick inserted in the center of a muffin comes out clean. Transfer to a wire rackand let cool for about 5 – 10 minutes before removing from pan. Can be covered and stored at room temperature for a few days or they can be frozen.
http://www.joyofbaking.com/muffins/ChocolateChipMuffins.html