To assemble the jars: Use a 2-inch cookie cutter or use a knife to cut 1-inch cubes from the brownies. Place a cut-out brownie or a couple cubes of brownies at the bottom of an 8-ounce Mason jar. Use one or two layers of brownies. (You may have leftover brownies.) With a small spoon, scoop some pudding on top of the brownies to fill 2/3 of the jar. Top with a few chocolate curls. Keep in the refrigerator until ready to serve or give.