It's held on the day before Ash Wednesday, marking the beginning of the Christian season of Lent.
The Action Cam was at Haegele's Bakery in Tacony, where the Fastnachts are now on sale!
Doors opened at 5 a.m. on Tuesday, and longtime customers were ready to go that very minute.
The German bakery sells the special treats just twice a year, with Fat Tuesday being one of them.
Fastnachts are a specific type of donut and are known as a Pennsylvania Dutch tradition. They are similar to beignets and doughnuts, but are often larger and without a hole in the middle. The treat is often made with potatoes, yeast, or baking powder and is finished off with powdered sugar, or cinnamon sugar.