You'll let it sit for about two hours or "just until the Dr Pepper is hot but not simmering too much or boiling," says Morgan. While the soda is heating up, cut your lemon into thin slices.

She recommended heating the Dr. Pepper so that it is slightly simmering but not boiling, before fresh lemon slices. In a separate clip, she revealed the “lazy” way to make hot Dr. Pepper ...

Once boiling, add gelatin and stir until dissolved. Stir in Diet Dr. Pepper (or coke of choice). Store leftover congealed ...