Preheat oven to 375 degrees F. Line a baking pan with parchment paper and set aside.
In a large bowl mix the flour, baking soda, salt, baking powder. Set aside.
Cream together butter and sugars until light and fluffy.
Mix in the eggs and vanilla until combined.
Mix in the dry ingredients until combined.
Fold in the chocolate chips.
Roll dough into 1-2 inch balls and place evenly apart on prepared baking sheet.
Bake for 8-10 minutes.
Remove from oven and place 3 chocolate chips, pointed side inside each cookie.
Use a piping bag or a toothpick to make spider legs on each chocolate chip with the extra melted chocolate.