Combine the cinnamon and sugar in a shallow bowl. Set aside.
Working one at a time, use a rolling pin to flatten each piece of biscuit dough into a disc roughly ¼-inch thick. Repeat until all the dough has been flattened.
Dollop a spoonful of Nutella in the center of half the dough rounds.
Place a piece of dough on top of each disc topped with Nutella. Use fingers to pinch the edges together, sealing the dough.
In a large pot, heat enough oil to submerge the dough to 350 degrees Fahrenheit.
Working in batches, place each biscuit doughnut in the oil. Cook 4-5 minutes on each side or until they’re golden brown and cooked all the way through.
Set aside on a paper towel, and repeat until all the dough has been fried.
Roll each biscuit doughnut in the bowl of cinnamon sugar, and enjoy warm!
Store leftovers in an airtight container in the fridge for up to 2 days.
