It doesn't look like it according to the ingredient list (I don't think they're allowed to hide tree nuts under natural flavors):

https://www.internationaldelight.com/products/coffee-creamers/flavor-faves/reeses-peanut-butter-cup/

QuoteIngredients

WATER, CANE SUGAR, PALM OIL, CONTAINS 2% OR LESS OF: COCOA (PROCESSED WITH ALKALI), SODIUM CASEINATE* (A MILK DERIVATIVE), DIPOTASSIUM PHOSPHATE, CARRAGEENAN, MONO AND DIGLYCERIDES, NATURAL AND ARTIFICIAL FLAVORS, SODIUM STEAROYL LACTYLATE, SALT.
*SODIUM CASEINATE IS NOT A SOURCE OF LACTOSE.

Here's their allergen policy, though:

https://www.internationaldelight.com/faqs/

QuoteDoes International Delight contain any allergens such as peanuts?

The best source of information related to ingredients and the presence of allergens is the nutrition facts panel on the product's packaging. International Delight does not contain peanuts, wheat, eggs, fish, shellfish or soy. However, our products are produced at a variety of facilities across the United States that may also process products containing these allergens.

Does it have Hazelnut? I read on another allergy site it was?

Good to know there isn't a risk of xc.

And if our kiddos ever want to know what PB tastes like, I guess this would be a safe option!

I heard back from the company - it has no peanut ingredients in it!

In spite of the years ofDS's allergy, I have always liked PB. But that just sounds gross.

International Delight has come out with a Reese's variety of coffee creamer.