Peanut butter has a remarkable ability to play well with ingredients from jelly to chocolate to chili pepper.
Reese's peanut butter cups, which have been a mainstay in lunchboxes, grocery aisles, and snack racks for more than a century, are the perfect example of this quality. However, very recently, some fans commented that the taste was not what it had been, and this was highlighted in a letter from Brad Reese on Valentine's Day 2026. His letter noted several seasonal Reese's "shapes" (e.g., hearts) now being made with "compound coating" and "peanut butter crème." Although the manufacturer maintained that the original cup hasn't altered, opinions may change in surprising ways after an ingredient reformulation story makes the rounds through our perception.
In the episode, I explore the marketing placebo, or the notion that context signals, like as pricing and labeling, impact actual experiences. The same wine is judged as more delightful because it has a higher price tag, and brain activity shifts in areas linked to subjective pleasantness, we have to consider the nature of perception as guiding our experience, rather than the "actual" ingredients or wine alone. Other studies indicated that "cheap" cues and discounts may lessen perceived, and occasionally even quantifiable, product efficacy, like energy drinks. When combined, the findings shed light on why "tastes different" is rarely just due to component differences. That doesn't mean it is less important, though. Taste, texture, and retronasal smell combine to form flavor, which the brain constructs through interaction with memory, expectation, and social narrative. To put it another way, the flavor of something changes as perception of it changes.
Note: This episode contains a 2026 news clip by NBC. The audio is for purposes of commentary and critique under Fair Use (17 U.S.C. § 107).