1. In a bowl, combine 13/4 cups of the flour, the baking powder, baking soda and salt. In another bowl, blend cocoa and remaining 1 cup flour.
2. Spoon half the flour-cocoa mixture into jar. Press down to flatten, using a small spice jar. Spoon half the plain flour mixture over cocoa layer; compact. Repeat. Top with brown sugar and granulated sugar, compressing each. Add chips and M&Ms to jar.
3. Attach baking instructions: Blend 2 sticks cooled, melted unsalted butter with 3 eggs, 1/3 cup milk and 2 tsp vanilla extract. Stir in cookie mix until blended. Drop by heaping tbsp onto cookie sheets. Bake at 350 degrees for 13 minutes or until firm. Cool on pan for 1 minute, then remove to a rack.