In a small saucepan over medium-low heat, add 1/4 cup maple syrup, 1 tsp vanilla extract, 1/3 cup brown sugar, 1/3 cup unsalted butter. Allow all the ingredients to melt.
While the wet ingredients melt, stir the dry ingredients in a separate bowl: 3 cups oats, 1/2 cup shredded coconut, 1 tsp cinnamon, and 1/2 tsp fine sea salt.
In a small bowl, whisk the egg white until frothy.
Pour the melted wet ingredients over the oat mixture, stir until it is all coated.
Fold the whisked egg white into the mixture.
Pour the oats on a parchment paper-lined cookie sheet.
Place in the preheated oven for 20 minutes.
After 20 minutes, stir the granola with a spatula and place it back in the oven for 15 minutes.