Question: how long to cook 2 batches of brownies?
Answer: Prepare batter using 2 packages any Betty Crocker®Premium brownie mix (see list below), double all ingredients for the water, oil and eggs called for on the package directions. Bake 51 to 53 minutes for shiny metal or glass pan and 45 to 47 minutes for dark nonstick pan. Cool 1 hour before cutting.