In a large pan on the stove over medium high heat, melt the brown sugar, water and margarine together and stir and heat until it boils.
Remove from heat and immediately stir in the chocolate chips. Mix until melted.
Beat your eggs with a fork and then stir them into the chocolate mixture.
Add the dry ingredients and stir them in until completely combined.
Roll into one inch balls and drop onto a cookie sheet (preferably with a Silpat mat). If you don't have a Silpat mat make sure you have a greased cookie sheet.
Bake for about 7-8 minutes. Cookie should be just starting to have cracks in it.
Use a ziploc bag full of your frosting to squeeze about a Tablespoon onto a cookie. Sandwich with another cookie.