Look at the directions on the cake mix box…
-- add one more egg (or add two additional if you want it to be really rich)
-- double the oil amount, but use melted butter instead of oil
-- use milk instead of water....

From: fabulesslyfrugal.com

Photo credit: fabulesslyfrugal.com Ideas from our Frugal Freebies Facebook fan page:

Jennifer McGraw Kilburne posted: That's too much to remember. I just add a big scoop of mayo to a cake mix. Perfect cake every time.

Kim Stenson posted: Add 1 pkg. dry pudding mix in the flavor of the cake your making, so moist and so good...
[null, null, {"document_url": "http://www.frugal-freebies.com/2012/06/better-cake-mix-trick.html", "unformatted_src": "http://1.bp.blogspot.com/-aKwOgQEYGXU/T-8YWFKvWNI/AAAAAAAASEk/76yfmcRX0Y8/s320/duncan-hines-cake-mix.jpg", "src": "http://1.bp.blogspot.com/-aKwOgQEYGXU/T-8YWFKvWNI/AAAAAAAASEk/76yfmcRX0Y8/s320/duncan-hines-cake-mix.jpg", "formatted_filename": "duncan hines cake mix", "rendered_width": 272, "rendered_height": 314}, null, {"document_url": "http://www.frugal-freebies.com/2012/06/better-cake-mix-trick.html", "unformatted_src": "//assets.pinterest.com/images/PinExt.png", "src": "http://assets.pinterest.com/images/PinExt.png", "formatted_filename": "PinExt"}, null, {"document_url": "http://www.frugal-freebies.com/2012/06/better-cake-mix-trick.html", "unformatted_src": "http://4.bp.blogspot.com/-KJeVj4HW8Po/TvHFgwgtAmI/AAAAAAAAOaQ/QCYU-SFZFsc/s1600/catherinethumbnail.jpg", "src": "http://4.bp.blogspot.com/-KJeVj4HW8Po/TvHFgwgtAmI/AAAAAAAAOaQ/QCYU-SFZFsc/s1600/catherinethumbnail.jpg", "formatted_filename": "catherinethumbnail", "alt_text": "Catherine", "rendered_width": 60, "rendered_height": 60}, null, null, null, null, null, {"document_url": "http://www.frugal-freebies.com/2012/06/better-cake-mix-trick.html", "unformatted_src": "http://i.creativecommons.org/l/by-nc-nd/2.0/ca/88x31.png", "src": "http://i.creativecommons.org/l/by-nc-nd/2.0/ca/88x31.png", "alt_text": "Creative Commons Licence"}, null, null]