Reese’s cups are chocolate and peanut butter in one wrapper, so people ask two questions at once.
What is on the label
I pulled the ingredient list for Reese’s 2 Peanut Butter Cups from Open Food Facts (product code 03444009). Ingredients are listed from the most to the least by weight.
Milk chocolate (sugar, cocoa butter, chocolate, skim milk, milk fat, lactose, lecithin (soy), pgpr), peanuts, sugar, dextrose, salt, tbhq & citric acid (to maintain freshness)
Recipes change, and flavors and package sizes can differ, so read the bag you actually have before you rely on this list.
What matters for your dog
- Chocolate. ASPCA says chocolate is toxic to dogs because of compounds called methylxanthines. It says the darker the chocolate, the greater the risk, that white chocolate has the least, and that baking chocolate and cocoa powder have the most. Milk chocolate is the first ingredient on this label.
About Reese’s Peanut Butter Cups
The label lists milk chocolate first (sugar, cocoa butter, chocolate, skim milk, milk fat, lactose, soy lecithin, PGPR), then peanuts, sugar, dextrose, salt, TBHQ and citric acid. No xylitol, raisins or macadamia nuts are listed. Pet Poison Helpline warns that chocolate candy can also contain those other poisonous foods, so it’s worth checking.
The peanut butter part doesn’t change the chocolate concern. ASPCA says the risk grows with darker chocolate and with the amount eaten, and how serious a few cups are depends on your dog’s weight.
Reese’s makes minis, big cups, Thins, eggs and seasonal shapes. They have different labels and different amounts of chocolate. I checked the standard cups.
If your dog already ate some
Write down what it was, how much, when, and your dog’s weight, and keep the package. Then call your vet, ASPCA Poison Control at (888) 426-4435, or Pet Poison Helpline at (855) 764-7661.
Don’t wait for symptoms if the snack has chocolate, xylitol, or a lot of onion or garlic in it. And don’t try to make your dog vomit with salt or salt water. Pet Poison Helpline says that can cause salt poisoning.
Questions people ask
Can dogs eat peanut butter cups?
The chocolate makes it a poor idea. Pet Poison Helpline says chocolate contains theobromine and caffeine, which can cause vomiting, diarrhea, a high heart rate, tremors and seizures. Call your vet if your dog ate some.
Is the peanut butter in Reese’s okay by itself?
The peanuts are not the concern here. The chocolate is. For peanut butter on its own, the thing to check is xylitol on the label. This one lists none.
My dog ate a bag of mini cups. What do I do?
Call your vet or Pet Poison Helpline now. Have the bag, the number of cups eaten, and your dog’s weight ready.
More label checks
- Can Dogs Eat M&M’s?Chocolate is the first ingredient. Call your vet or a poison hotline.
- Can Dogs Eat Jif Peanut Butter?Peanuts, sugar, palm oil, salt, molasses. No xylitol on this label.
- Can Dogs Eat Oreos?Cocoa is on the label. One cookie is a smaller worry than a sleeve.
- Can Dogs Eat Skittles?No chocolate or xylitol on the label. It's sugar and dye.
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Sources
- ASPCA: People Foods to Avoid Feeding Your Pets
- Pet Poison Helpline: Salt
- Pet Poison Helpline: Chocolate
- Open Food Facts: Reese’s 2 Peanut Butter Cups (code 03444009)
Last reviewed October 31, 2026. I’m not a vet, and this page is general information, not veterinary advice. Every dog is different. If you’re worried about your dog, call your vet.