Have you ever wondered why some unfrosted Pop-Tarts have more calories than frosted?

A single Kellogg's Frosted Strawberry Pop-Tart has 200 calories, while an Unfrosted Strawberry Pop-Tart has 210 calories.

Not many people realized this odd fact until Spencer Gaffney wrote a viral blog post for the University Press Club in 2009.

The post hit Reddit, and users speculated over the nutritional information of the Pop-Tarts.

The calorie count stumped users on Twitter as well.

The mystery remained unsolved until recently.

Quartz reached out to Kellogg's and finally found the solution.

"Unfrosted Pop-Tarts have a slightly thicker crust to compensate for the lack of frosting, resulting in a few more calories per serving,” a Kellogg’s representative told Quartz.

The representative also shared that the Unfrosted Pop-Tart makes up for its absence of frosting with, “the overall composition of the food, including weight, breakability, toastabilty.”

A simple response to what some feel is a shocking fact about the snacks.