Preheat the oven to 450 degrees F, line a muffin pan with liners, set aside.
In a medium bowl, sift together 1 1/2 cups flour, baking soda, baking powder, and salt. Set aside.
In a large bowl, cream together the butter and sugar, then add in the eggs, yogurt, and vanilla.
Gently fold the dry ingredients into the wet ingredients, the batter will be lumpy, do not over mix.
Fold the chocolate chips into the batter.
Add a level 1/4 cup of batter to each muffin liner and top with additional chocolate chips and coarse sugar, if desired.
REDUCE THE HEAT TO 375 DEGREES and bake for 12 to 16 minutes until the tops are golden brown and a toothpick comes clean from the center of the muffins.
Allow to cool in the pan for a few minutes before removing. Serve plain or with butter.