Did you...toast them before eating them?

https://en.wikipedia.org/wiki/Pop-Tarts

Pop-Tarts (stylized as pop•tarts) is a brand of toaster pastries produced and distributed by Kellanova (formerly Kellogg's) since 1964, consisting of a sweet filling sealed inside two layers of thin, rectangular pastry crust. Most varieties are also frosted. Although sold precooked, they are designed to be warmed inside a toaster or microwave oven.