In your largest bowl stir together the flour, bicarb soda, salt, brown sugar and white sugar. Add the copha and stir until mixture is mealy. Lightly stir in the chocolate chips until they are distributed evenly. Place 4 cups of the mix into each jar.
Attach the following directions to the jar: Preheat oven to 190 degrees C. In a medium bowl beat 2 eggs and 1 teaspoon of vanilla until well blended. Add entire contents of the jar to the bowl, stir until combined. Drop by teaspoonfuls onto baking tray and bake in the preheated oven for 10 to 12 minutes. This recipe makes about 2 dozen.