Cooking Experiment : With what should I brush my rolls before baking them ?

With what should you brush a bun / roll before baking it ? This video will unveil the truth once and for all ! We never know ! One recipe says something, another recipe says something else ! So I wanted to understand it by myself. I made this experiment : I prepared 12 famous brushing and I applied them to (fluffy) dinner rolls. In the experiment, you have the ability to observe the results by yourself ! The liquids I have chosen were found in recipes, books and over the internet. - Egg white - Egg yolk - Beaten egg - Water Egg Wash ( egg + 2Tbsp water ) - Milk Egg Wash ( egg + 2Tbsp milk ) - Melted butter - Buttermilk - Milk - Oil - Baking Soda Water ( 1tsp baking soda and 3 tsp water ) - Water - None ( essential to point out differences ) The results are quite interesting ! Here's my conclusion ( in my opinion only ) - For sweet buns : I would choose "Egg wash with milk" - For salty buns : I would choose "Milk" or "Baking soda water"