Ugh. I just ate one of those Zone chocolate mint energy bars (yummy) then took a sip of coffee (also yummy). The two flavors combined and created a taste in my mouth that was as if I had eaten some pretzels. Pretzels coated in fireplace ash (not yummy).
Have you ever had two foods combine to make a new good or not good flavor?
Blech. Odd that you bring this up. This morning, I was chewing Trident Cool Rush, and took a swig of my venti Americano (1 Sweet n Low, 1 Equal packet, no cream). The taste was oddly reminiscent of beef broth. I don’t know if it was the mintiness of the gum playing off the strong coffee flavor, or if the sweetners were to blame. Don’t really care, either - now way I’m doing that again. Gag.
There’s always the classic combo of toothpaste and orange juice which tastes like burning.
My GF put french vanilla ice cream and chocolate syrup on a dinner roll. I laughed and laughed at her until I tasted it. Now we bake rolls just to make these little deserts.
I don’t mind that anymore. My love for orange juice is insurmountable. Mmmm… I can’t drink orange juice before brushing my teeth, because I’m afraid that horrible morning breath will taint my experience.
My dorm’s cafeteria occasionally has flavor syrups to mix in with coffee. I got the bright idea that I could make my own vanilla Cokes. And then later I branched out and tried raspberry (soooooooo good…like an old fashioned cherry Coke but better). Then, yesterday I was feeling experimental so I put a shot of Hazelnut in my Coke. I lifted the glass to my nose, and it smelled like someone had recently thrown up an entire pot of coffee. Ugh. The smell alone was enough to keep me from tasting it. Blech.
Have you ever tried mixing it up with blue cheese? Most definitely not a taste treat!
Following up chocolate milk (okay, it was actually a chocolate protein shake, but it’s more or less just chocolate milk taste-wise) with diet pepsi brings out a strong lemon flavor in the pepsi. Not unpleasant, just unexpected.
If you eat a square of colby-jack cheese sandwiched by two Golden Grahams, you get a flavor not entirely unlike cheesecake.
Just try it.
If you drink Mountain Dew while eating real down-home pork rinds, it creates a new, very disgusting taste. Yeah, you should try it! 
Once, I was walking down the street eating a jar of peanut butter, and I rounded a corner and ran smack into a guy eating a chocolate bar…
I miss those ads!
Seriously though, one combination I don’t recommend is eating Oreos and then immediately afterward brushing your teeth with a baking-soda toothpaste. Not only do the Oreo bits in your molars keep the toothpaste from foaming up, but it tastes like fish! Ugh!
About 15 years ago I was at the campus bookstore buying some chocolate and Advil (or whatever was available then). I also bought some Ritz crackers and made little sandwiches with the crackers and the chocolate. It was very very very yummy. However, I haven’t tried it since, so I don’t know if it was really yummy, or if it was just yummy because it was that time of the month.
I’ve mentioned the spicy barbecue sauce + Diet Dr Pepper = Red Hots before.
I sometimes put a small piece of cheese (so far only cheddar, but I’ll probably try others) on a Ritz cracker and put it in the microwave for a few seconds. Good stuff. (I actually discovered this by eating Leary biscuits - go ahead and Google it. Yes, that Leary.)
We were having Indian food and our 3yo was not all that interested in her standard dinner which lead to an unusual flavor combo
Palak Paneer + Raw Banana = delish
Try it.
Stirfry that leftover rumaki with broccoli to enjoy the dish that I have named “rumakoli.” Mmmm.
About 14 years ago, I did some volunteer work in a small village in Tanzania. Each member of our group was supposed to bring American food to have at a feast at the end of our visit. The natives had no clue what to expect of our food, so they just kind of swirled it up.
We had spanish rice, tuna casserole and get this… jello.
They swirled all these up and ate tasted them. They were not happy.
Luckily, we had some of their normal beans and rice too.
Fruit punch (Jungle Juice in particular… I think that might be a local brand though) with Three Musketeers tastes a lot like a really intense chocolate covered cherry. Really brings out the flavor of the fruit in the drink.
Jungle Juice, at least where I am, is a drink a lot of the frats serve at their parties. You mix Everclear with Hawaiian punch and orange soda and all different kinds of fruity goodness. And then you can’t taste the alcohol, but it’s there. Boy howdy, is it ever there. So girly. So strong. So good.
Rice Krispies with sliced banana and strawberries tastes and smells a great deal like Cap’n Crunch with Crunchberries.
tuna fish and ramen noodles soup. chicken flavor.
seriously it’s great
just drain the broth and mix the tuna (of course mixed w/mayo) with the noodles. I eat the stuff like everyday.