Mix in the rest of the dry ingredients by hand - be careful not to over mix - the batter should be lumpy and have some flour streaks still.
Fold in 2 1/2 C of the chocolate chips
Scoop into muffin tins
press then last 1/2 C chocolate chips into the tops of the muffins and for extra crunch sprinkle coarse turbinado sugar (or sugar crystals) on the top too
Bake at 375 for 5 mins then lower the oven to 350 and finish baking, 12-15 mins