What can cause a coating on my tongue? too many baked goods?

Brush it: Maybe....So bring all of your baked goods down to my office! seriously, i doubt you have a big problem, but see your dentist to confirm. Geographic tongue can make your tongue look funny, but you can also have an overgrowth of papillae, coffee stains, etc. Try brushing your tongue aggressively with your toothbrush or a tongue scraper available at your drug store.