Controversy over Reese’s ingredients reveals standard food industry practices most consumers never notice

A 'triangle test' involves mixing up two of the original products with one of the new reformulation -- or vice versa -- to see whether taste testers notice the difference. Garrett Aitken/iStock/Getty Images Plus via Getty Images

Springtime in Pennsylvania is peanut butter egg season. This year some consumers may taste the eggs a bit more critically and scrutinize the ingredients and label more carefully.

Reese’s, a Hershey brand, is known for combining chocolate and peanut butter in delicious and iconic ways. Reese’s products come in a variety of formats, called “line extensions.” These include everything from peanut butter chips for baking and chocolate peanut butter popcorn for snacking to limited-time offers for holidays – such as the popular Reese’s Peanut Butter Eggs for Easter.