- Preheat oven to 325 degrees F. Line a large baking sheet with parchment paper and grease with tallow spray (or avocado oil spray).  
- Place an oven safe cup filled with water into the oven. 
- Place the egg whites and apple cider vinegar into a stand mixer.  Mix on high until stiff peaks form (about 4-5 minutes). 
- With the mixer on low speed, slowly add one at a time, egg white protein, gelatin, allulose and salt. Then add one yolk at a time.  
- Turn the mixer off and scrape the sides to combine everything well.  
- Grease a large ice cream scooper with tallow and scoop the batter to form buns and place on the prepared baking sheet. I use THIS one. 
- Bake for 15 minutes. Turn the oven off and leave buns in the oven for another 15 minutes.  
- Remove from the oven and allow to cool before slicing the buns. Enjoy with a burger, pulled pork, egg sandwich, tuna salad... YUM!