- Preheat oven to 350°F. Line a baking sheet with parchment paper and set aside. 
- Using a hand whisk, beat the egg and set it aside. 
- Combine the applesauce, oat flour, and rolled oats in a large bowl. Pour all but 1 tablespoon of the egg over the mixture and set aside the remaining 1 tablespoon of egg. 
- Using a wooden spoon, stir the mixture until a dough forms. The dough should be tacky but not overly sticky. Add a bit more or less flour if necessary. 
- Take a 2-tablespoon-sized piece of dough (approximate) and roll it into a tube. It should be about 10 inches long and about the width of a pencil. 
- Take each tube and make into a U shape, then twist the ends together and fold back to the top. This makes the pretzel shape. Pinch the ends in to make sure they’re secure. 
- Place the pretzels onto the baking tray. Brush the top of each pretzel with the remaining egg. 
- Bake for approximately 25-30 minutes, until they're slightly browned and become crispy. The pretzels should be pretty hard, just like pups love them! 
- Remove from the oven and allow to cool before serving. 
- Store in an airtight container for up to 2 weeks.