Preheat oven to 400°F.
Grease twelve muffin cups.
In a large bowl, stir together flour, sugars, baking powder, and salt.
In another bowl, stir together milk, eggs, butter, and vanilla until blended.
Make a well in center of dry ingredients.
Add milk mixture and stir just to combine.
Stir in chocolate chips and nuts.
Spoon batter into prepared muffin cups.
Now bake for 15-20 minutes or until a cake tester inserted in center of one muffin comes out clean.
Remove muffin tin to wire rack.
Cool for 5 minutes.
Remove from tins to finish cooling.
Serve warm or completely cool.
These muffins freeze well.
