Do you have Bailey's Irish Cream in the pantry? Best way in the world to flavor coffee! Any other liqueur would work...Frangelico, Amaretto, etc.

Lacking Bailey's, you could put a sprinkle of cinnamon and a drop or two of orange extract in the basket with the ground coffee. How much would depend on your taste and the amount of coffee you are brewing.

Or, if there is any eggnog in the fridge, it makes an interesting creamer.

If you like mocha flavors, you could add a spoonful or so of instant cocoa mix to your cup of coffee.

I bought some vanilla sugar at Penzeys, that is good for both coffee and chai. You can make your own by sticking a chopped up vanilla bean into a bowl of sugar.

Hot cocoa mix (the kind with sugar, cocoa, milk powder, etc) is a great addition to coffee.

You looking to make a flavored coffee creamer....
How about milk, sugar and a bit of vanilla? Or almond extract? Or powdered milk, powdered sugar and some cinnamon?
How about putting a teaspoon of pudding mix into your coffee?
I have also stirred ice cream into my coffee when I wanted a coffee dessert.....then microwaved it for 10 seconds to make it hot again.

I like the coffee creamers. But if I didn't have any available, a few pantry items come to mind. A little cocoa powderand/or cinnamon. Maple syrup, instead of sugar... might even be a little "better" for ya?!?

I love the flavor of coffee brewed with cinnamon. Just shake some ground cinnamon over the ground coffee.

I love cocoa powder, milk, and a drop of peppermint extract