Step 1: Preheat the oven to 400 degrees. Grease 12 muffins cups (or muffin tins). In a large bowl mix together flour, white sugar, brown sugar, baking powder and salt.
Step 2: In another bowl stir together eggs, milk, butter and vanilla until well blended. Make a well in the center of the dry ingredients. Pour the milk mixture into the well and stir until well combined. Lightly stir in chocolate chips and chopped nuts.
Step 3: Spoon batter into muffins cups or tins. Place into the oven and bake for 15-20 minutes or until a toothpick comes out clean. Remove from the oven and allow to cool for 5 minutes.