Reese's Pieces were introduced in the UK in 1996, but are produced in the US. Reese's Pieces are a product extension of the Reese's Peanut Butter Cups line; they were designed to capitalize on the success of the chocolate-covered peanut butter cups, though unlike the cups, they have no chocolate.

Even your next package of the peanut butter and chocolate treats will be dominated by orange candies, but this isn't a fluke. According to Delish, this is exactly how each bag or box of Reese's Pieces is supposed to turn out, as the color distribution goal for each package is 50% orange, 25% yellow, and 25% brown.

Reese's Pieces: Sugar, particularly defatted peanuts: particularly hydrogenated vegetable oils (palm kernel oil and soybean oil), reduced minerals whey (milk), dextrose, contains 2% or less of : corn syrup, artificial color (blue 1 lake, red 40 lake, yellow 5 lake, yellow 6 lake), salt, soy, lecithin, resinous glaze, ...

Even though all Reese's shapes are made the exact same way with the exact same recipe, the temperature at which the chocolates hang out in during shipping could play a factor into how fresh each shape tastes.